cc3b528 gui: remove OpenSSL PRNG seeding (Windows, Qt only) (fanquake)

Pull request description:

  This removes the code introduced in [#4399](#4399) that attempts to add additional entroy to the OpenSSL PRNG using `RAND_event()`. This is specific to bitcoin-qt running on Windows.

  ```
  RAND_event() collects the entropy from Windows events such as mouse movements and other user interaction.
  It should be called with the iMsg, wParam and lParam arguments of all messages sent to the window procedure.
  It will estimate the entropy contained in the event message (if any), and add it to the PRNG.
  The program can then process the messages as usual.
  ```

  Besides BIP70, this is the last place we are directly using OpenSSL in the GUI code. All other OpenSSL usage is in [random.cpp](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp).

  Note that we are still also still doing other Windows specific gathering using [RandAddSeedPerfmon](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L268) and [RAND_screen()](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L600) on top of the other generation we do.

  Also note that if RAND_event returns `0` here (PRNG has **NOT** been seeded with enough data), we're just logging a single message and continuing, which also seems less than ideal.

ACKs for top commit:
  laanwj:
    ACK cc3b528
  MarcoFalke:
    unsigned ACK cc3b528
  theuni:
    ACK cc3b528.

Tree-SHA512: 0bb18779cf37f6670e3e5ac6a6a38e5f95199491b2684f9e56391c76f030fe1621d6df064239c2a398f228129fdf3f2220fc8cd15b2b92ecf2ea6d98a79b2175

Follow up to bitcoin#17151 where
there were multiple calls to also remove our call to RAND_screen().

Follow up to bitcoin#17151 where
there were multiple calls to also remove our call to RAND_screen().

e892f96 random: remove call to RAND_screen() (Windows only) (fanquake)

Pull request description:

  Follow up to #17151 where there were multiple calls to also remove our call to RAND_screen().

ACKs for top commit:
  MarcoFalke:
    unsigned ACK e892f96
  laanwj:
    ACK e892f96

Tree-SHA512: 1b846016d91e8113f90466b61fcaf0574edb6b4726eba1947549e2ac28907e1318d893f7b303e756f19730c8507c79b10e08d54b97153224b585ff1e0ac1953e

cc3b528 gui: remove OpenSSL PRNG seeding (Windows, Qt only) (fanquake)

Pull request description:

  This removes the code introduced in [bitcoin#4399](bitcoin#4399) that attempts to add additional entroy to the OpenSSL PRNG using `RAND_event()`. This is specific to bitcoin-qt running on Windows.

  ```
  RAND_event() collects the entropy from Windows events such as mouse movements and other user interaction.
  It should be called with the iMsg, wParam and lParam arguments of all messages sent to the window procedure.
  It will estimate the entropy contained in the event message (if any), and add it to the PRNG.
  The program can then process the messages as usual.
  ```

  Besides BIP70, this is the last place we are directly using OpenSSL in the GUI code. All other OpenSSL usage is in [random.cpp](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp).

  Note that we are still also still doing other Windows specific gathering using [RandAddSeedPerfmon](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L268) and [RAND_screen()](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L600) on top of the other generation we do.

  Also note that if RAND_event returns `0` here (PRNG has **NOT** been seeded with enough data), we're just logging a single message and continuing, which also seems less than ideal.

ACKs for top commit:
  laanwj:
    ACK cc3b528
  MarcoFalke:
    unsigned ACK cc3b528
  theuni:
    ACK cc3b528.

Tree-SHA512: 0bb18779cf37f6670e3e5ac6a6a38e5f95199491b2684f9e56391c76f030fe1621d6df064239c2a398f228129fdf3f2220fc8cd15b2b92ecf2ea6d98a79b2175

Follow up to bitcoin#17151 where
there were multiple calls to also remove our call to RAND_screen().

This should have been part of bitcoin#17151.

This should have been part of bitcoin#17151.

This should have been part of bitcoin#17151.

This should have been part of bitcoin#17151.

This should have been part of bitcoin#17151.

This should have been part of bitcoin#17151.

Follow up to bitcoin/bitcoin#17151 where
there were multiple calls to also remove our call to RAND_screen().

- gui: Avoid Wallet::GetBalance in WalletModel::pollBalanceChanged bitcoin#18160
- gui: Drop PeerTableModel dependency to ClientModel bitcoin#18060
- gui: Break trivial circular dependencies bitcoin#18036
- gui: Improve "Hide" button tool-tip message bitcoin#17360
- gui: Shortcut to close ModalOverlay bitcoin#17998
- gui: Remove warning "unused variable 'wallet_model'" bitcoin#17939
- refactor: Use PACKAGE_NAME in GUI modal overlay and bitcoin-wallet bitcoin#17923
- gui: remove OpenSSL PRNG seeding (Windows, Qt only) bitcoin#17151

- gui: Avoid Wallet::GetBalance in WalletModel::pollBalanceChanged bitcoin#18160
- gui: Drop PeerTableModel dependency to ClientModel bitcoin#18060
- gui: Break trivial circular dependencies bitcoin#18036
- gui: Improve "Hide" button tool-tip message bitcoin#17360
- gui: Shortcut to close ModalOverlay bitcoin#17998
- gui: Remove warning "unused variable 'wallet_model'" bitcoin#17939
- refactor: Use PACKAGE_NAME in GUI modal overlay and bitcoin-wallet bitcoin#17923
- gui: remove OpenSSL PRNG seeding (Windows, Qt only) bitcoin#17151
- refactor: Remove unused defines in qt/bitcoinunits.h bitcoin#17869

Follow up to bitcoin/bitcoin#17151 where
there were multiple calls to also remove our call to RAND_screen().

This should have been part of bitcoin#17151.

Summary:
```
This removes the code introduced in
[#4399](bitcoin/bitcoin#4399)
that attempts to add additional entroy to the OpenSSL PRNG using Windows
messages.
Note that this is specific to bitcoin-qt running on Windows.

RAND_event() collects the entropy from Windows events such as mouse
movements and other user interaction.
It should be called with the iMsg, wParam and lParam arguments of all
messages sent to the window procedure.
It will estimate the entropy contained in the event message (if any),
and add it to the PRNG.
The program can then process the messages as usual.

Besides BIP70, this is the last place we are directly using OpenSSL in
the GUI code. All other OpenSSL usage is in random.cpp.

Note that we are still also doing Windows specific entropy gathering in
multiple other places. Such as
[RandAddSeedPerfmon](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L268)
and [RAND_screen()](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L600).

Also note that if RAND_event returns 0 (PRNG has NOT been seeded with
enough data), we're just logging a message and continuing on, which
seems less than ideal.
```

Backport of core [[bitcoin/bitcoin#17151 | PR17151]].

Test Plan: Run the build-win64 CI build plan.

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D6156

Summary:
```
Follow up to bitcoin/bitcoin#17151 where
there were multiple calls to also remove our call to RAND_screen().
```

Backport of core [[bitcoin/bitcoin#17191 | PR17191]].

Test Plan: Run the build-win64 CI build plan.

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D6157

Follow up to bitcoin/bitcoin#17151 where
there were multiple calls to also remove our call to RAND_screen().

Summary:
```
This removes the code introduced in
[#4399](bitcoin/bitcoin#4399)
that attempts to add additional entroy to the OpenSSL PRNG using Windows
messages.
Note that this is specific to bitcoin-qt running on Windows.

RAND_event() collects the entropy from Windows events such as mouse
movements and other user interaction.
It should be called with the iMsg, wParam and lParam arguments of all
messages sent to the window procedure.
It will estimate the entropy contained in the event message (if any),
and add it to the PRNG.
The program can then process the messages as usual.

Besides BIP70, this is the last place we are directly using OpenSSL in
the GUI code. All other OpenSSL usage is in random.cpp.

Note that we are still also doing Windows specific entropy gathering in
multiple other places. Such as
[RandAddSeedPerfmon](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L268)
and [RAND_screen()](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L600).

Also note that if RAND_event returns 0 (PRNG has NOT been seeded with
enough data), we're just logging a message and continuing on, which
seems less than ideal.
```

Backport of core [[bitcoin/bitcoin#17151 | PR17151]].

Test Plan: Run the build-win64 CI build plan.

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D6156

Follow up to bitcoin/bitcoin#17151 where
there were multiple calls to also remove our call to RAND_screen().

Follow up to bitcoin/bitcoin#17151 where
there were multiple calls to also remove our call to RAND_screen().

Follow up to bitcoin#17151 where
there were multiple calls to also remove our call to RAND_screen().

This should have been part of bitcoin#17151.

Follow up to bitcoin#17151 where
there were multiple calls to also remove our call to RAND_screen().

This should have been part of bitcoin#17151.

cecbf6c Use secure.h header for secure allocators (Fuzzbawls)
d9f67da net: add ifaddrs.h include (fanquake)
e906436 build: check if -lsocket is required with *ifaddrs (fanquake)
414f405 rand: only try and use freeifaddrs if available (fanquake)
3a039d6 build: avoid getifaddrs when unavailable (Cory Fields)
77bddd7 Use GetStrongRandBytes in gmp bignum initialization (Fuzzbawls)
b70b26f Fix typo in comment in randomenv.cpp (Fuzzbawls)
fec460c Put bounds on the number of CPUID leaves explored (Pieter Wuille)
41ab1ff Fix CPUID subleaf iteration (Pieter Wuille)
8a9bbb1 Move events_hasher into RNGState() (Pieter Wuille)
88c2ae5 random: mark RandAddPeriodic and SeedPeriodic as noexcept (fanquake)
81d382f doc: correct random.h docs after bitcoin#17270 (fanquake)
f363ea9 Seed RNG with precision timestamps on receipt of net messages. (Matt Corallo)
7d6ddcb Run background seeding periodically instead of unpredictably (Pieter Wuille)
4679181 Add information gathered through getauxval() (Pieter Wuille)
88d97d0 Feed CPUID data into RNG (Pieter Wuille)
8f5b9c9 Use sysctl for seeding on MacOS/BSD (Pieter Wuille)
67de246 Gather additional entropy from the environment (Pieter Wuille)
6142e1f Seed randomness with process id / thread id / various clocks (Pieter Wuille)
7bde8b7 [MOVEONLY] Move cpuid code from random to compat/cpuid (Fuzzbawls)
52b5336 [MOVEONLY] Move perfmon data gathering to new randomenv module (Pieter Wuille)
27cf995 doc: minor corrections in random.cpp (fanquake)
fccd2b8 doc: correct function name in ReportHardwareRand() (fanquake)
909473e Fix FreeBSD build by including utilstrencodings.h (Fuzzbawls)
630931f break circular dependency: random/sync -> util -> random/sync (Fuzzbawls)
5eed08c random: remove call to RAND_screen() (Windows only) (fanquake)
ada9868 gui: remove OpenSSL PRNG seeding (Windows, Qt only) (fanquake)
22a7121 Fix non-deterministic coverage of test DoS_mapOrphans (Fuzzbawls)
79e7fd3 Add ChaCha20 bench (Jonas Schnelli)
6966aa9 Add ChaCha20 encryption option (XOR) (Jonas Schnelli)
28c9cdb tests: Add script checking for deterministic line coverage (practicalswift)
c82e359 test: Make bloom tests deterministic (MarcoFalke)
7b33223 Document strenghtening (Pieter Wuille)
0190dec Add hash strengthening to the RNG (Pieter Wuille)
67e336d Use RdSeed when available, and reduce RdRand load (Pieter Wuille)
4ffda1f Document RNG design in random.h (Pieter Wuille)
2b6381e Use secure allocator for RNG state (Pieter Wuille)
080deb3 Encapsulate RNGState better (Pieter Wuille)
787d72f DRY: Implement GetRand using FastRandomContext::randrange (Pieter Wuille)
5bc2583 Sprinkle some sweet noexcepts over the RNG code (Pieter Wuille)
774899f Remove hwrand_initialized. (Pieter Wuille)
698d133 Switch all RNG code to the built-in PRNG. (Pieter Wuille)
038a45a Integrate util/system's CInit into RNGState (Fuzzbawls)
5f20e62 Abstract out seeding/extracting entropy into RNGState::MixExtract (Pieter Wuille)
298f97c Add thread safety annotations to RNG state (Pieter Wuille)
2326535 Rename some hardware RNG related functions (Pieter Wuille)
d76ee83 Automatically initialize RNG on first use. (Pieter Wuille)
1a5dbc5 Don't log RandAddSeedPerfmon details (Pieter Wuille)
32e6c42 Simplify testing RNG code (Fuzzbawls)
972effa Make unit tests use the insecure_rand_ctx exclusively (Fuzzbawls)
af52bf5 Use a FastRandomContext in LimitOrphanTxSize (Fuzzbawls)
746d466 Introduce a Shuffle for FastRandomContext and use it in wallet (Fuzzbawls)
1cdf124 Use a local FastRandomContext in a few more places in net (Fuzzbawls)
e862564 Make addrman use its local RNG exclusively (Fuzzbawls)
94b2ead Make FastRandomContext support standard C++11 RNG interface (Pieter Wuille)

Pull request description:

  This is a collection of upstream PRs that have been backported to bring our RNG (`src/random`) code more up-to-date. The following upstream PRs have been included here:

  - bitcoin#12742
  - bitcoin#14624
    - some of this had already been merged previously
  - bitcoin#14955
  - bitcoin#15250
  - bitcoin#15224
  - bitcoin#15324
  - bitcoin#15296
  - bitcoin#15512
  - bitcoin#16878
  - bitcoin#17151
  - bitcoin#17191
  - bitcoin#13236
  - bitcoin#13314
  - bitcoin#17169
  - bitcoin#17270
    -  omitted last commit as our testing framework doesn't support it currently
    - omitted bitcoin@64e1e02, to be pulled in after our time utility is updated in a separate PR
  - bitcoin#17573
  - bitcoin#17507
  - bitcoin#17670
  - bitcoin#17527
  - bitcoin#14127
  - bitcoin#21486

ACKs for top commit:
  furszy:
    ACK cecbf6c with a minor nit that can be easily tackled later.
  random-zebra:
    rebase utACK cecbf6c and merging...

Tree-SHA512: 3463b693cc9bddc1ec15228d264a794f5c2f159073fafa2ccf6e2563abfeb4369e49505f97ca84f2478ca792bd07b66d2cd83c58044d6a0cae6af42d22f5784b

cc3b528 gui: remove OpenSSL PRNG seeding (Windows, Qt only) (fanquake)

Pull request description:

  This removes the code introduced in [dashpay#4399](bitcoin#4399) that attempts to add additional entroy to the OpenSSL PRNG using `RAND_event()`. This is specific to bitcoin-qt running on Windows.

  ```
  RAND_event() collects the entropy from Windows events such as mouse movements and other user interaction.
  It should be called with the iMsg, wParam and lParam arguments of all messages sent to the window procedure.
  It will estimate the entropy contained in the event message (if any), and add it to the PRNG.
  The program can then process the messages as usual.
  ```

  Besides BIP70, this is the last place we are directly using OpenSSL in the GUI code. All other OpenSSL usage is in [random.cpp](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp).

  Note that we are still also still doing other Windows specific gathering using [RandAddSeedPerfmon](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L268) and [RAND_screen()](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L600) on top of the other generation we do.

  Also note that if RAND_event returns `0` here (PRNG has **NOT** been seeded with enough data), we're just logging a single message and continuing, which also seems less than ideal.

ACKs for top commit:
  laanwj:
    ACK cc3b528
  MarcoFalke:
    unsigned ACK cc3b528
  theuni:
    ACK cc3b528.

Tree-SHA512: 0bb18779cf37f6670e3e5ac6a6a38e5f95199491b2684f9e56391c76f030fe1621d6df064239c2a398f228129fdf3f2220fc8cd15b2b92ecf2ea6d98a79b2175

cc3b528 gui: remove OpenSSL PRNG seeding (Windows, Qt only) (fanquake)

Pull request description:

  This removes the code introduced in [dashpay#4399](bitcoin#4399) that attempts to add additional entroy to the OpenSSL PRNG using `RAND_event()`. This is specific to bitcoin-qt running on Windows.

  ```
  RAND_event() collects the entropy from Windows events such as mouse movements and other user interaction.
  It should be called with the iMsg, wParam and lParam arguments of all messages sent to the window procedure.
  It will estimate the entropy contained in the event message (if any), and add it to the PRNG.
  The program can then process the messages as usual.
  ```

  Besides BIP70, this is the last place we are directly using OpenSSL in the GUI code. All other OpenSSL usage is in [random.cpp](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp).

  Note that we are still also still doing other Windows specific gathering using [RandAddSeedPerfmon](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L268) and [RAND_screen()](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L600) on top of the other generation we do.

  Also note that if RAND_event returns `0` here (PRNG has **NOT** been seeded with enough data), we're just logging a single message and continuing, which also seems less than ideal.

ACKs for top commit:
  laanwj:
    ACK cc3b528
  MarcoFalke:
    unsigned ACK cc3b528
  theuni:
    ACK cc3b528.

Tree-SHA512: 0bb18779cf37f6670e3e5ac6a6a38e5f95199491b2684f9e56391c76f030fe1621d6df064239c2a398f228129fdf3f2220fc8cd15b2b92ecf2ea6d98a79b2175

cc3b528 gui: remove OpenSSL PRNG seeding (Windows, Qt only) (fanquake)

Pull request description:

  This removes the code introduced in [dashpay#4399](bitcoin#4399) that attempts to add additional entroy to the OpenSSL PRNG using `RAND_event()`. This is specific to bitcoin-qt running on Windows.

  ```
  RAND_event() collects the entropy from Windows events such as mouse movements and other user interaction.
  It should be called with the iMsg, wParam and lParam arguments of all messages sent to the window procedure.
  It will estimate the entropy contained in the event message (if any), and add it to the PRNG.
  The program can then process the messages as usual.
  ```

  Besides BIP70, this is the last place we are directly using OpenSSL in the GUI code. All other OpenSSL usage is in [random.cpp](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp).

  Note that we are still also still doing other Windows specific gathering using [RandAddSeedPerfmon](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L268) and [RAND_screen()](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L600) on top of the other generation we do.

  Also note that if RAND_event returns `0` here (PRNG has **NOT** been seeded with enough data), we're just logging a single message and continuing, which also seems less than ideal.

ACKs for top commit:
  laanwj:
    ACK cc3b528
  MarcoFalke:
    unsigned ACK cc3b528
  theuni:
    ACK cc3b528.

Tree-SHA512: 0bb18779cf37f6670e3e5ac6a6a38e5f95199491b2684f9e56391c76f030fe1621d6df064239c2a398f228129fdf3f2220fc8cd15b2b92ecf2ea6d98a79b2175

cc3b528 gui: remove OpenSSL PRNG seeding (Windows, Qt only) (fanquake)

Pull request description:

  This removes the code introduced in [dashpay#4399](bitcoin#4399) that attempts to add additional entroy to the OpenSSL PRNG using `RAND_event()`. This is specific to bitcoin-qt running on Windows.

  ```
  RAND_event() collects the entropy from Windows events such as mouse movements and other user interaction.
  It should be called with the iMsg, wParam and lParam arguments of all messages sent to the window procedure.
  It will estimate the entropy contained in the event message (if any), and add it to the PRNG.
  The program can then process the messages as usual.
  ```

  Besides BIP70, this is the last place we are directly using OpenSSL in the GUI code. All other OpenSSL usage is in [random.cpp](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp).

  Note that we are still also still doing other Windows specific gathering using [RandAddSeedPerfmon](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L268) and [RAND_screen()](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L600) on top of the other generation we do.

  Also note that if RAND_event returns `0` here (PRNG has **NOT** been seeded with enough data), we're just logging a single message and continuing, which also seems less than ideal.

ACKs for top commit:
  laanwj:
    ACK cc3b528
  MarcoFalke:
    unsigned ACK cc3b528
  theuni:
    ACK cc3b528.

Tree-SHA512: 0bb18779cf37f6670e3e5ac6a6a38e5f95199491b2684f9e56391c76f030fe1621d6df064239c2a398f228129fdf3f2220fc8cd15b2b92ecf2ea6d98a79b2175

cc3b528 gui: remove OpenSSL PRNG seeding (Windows, Qt only) (fanquake)

Pull request description:

  This removes the code introduced in [dashpay#4399](bitcoin#4399) that attempts to add additional entroy to the OpenSSL PRNG using `RAND_event()`. This is specific to bitcoin-qt running on Windows.

  ```
  RAND_event() collects the entropy from Windows events such as mouse movements and other user interaction.
  It should be called with the iMsg, wParam and lParam arguments of all messages sent to the window procedure.
  It will estimate the entropy contained in the event message (if any), and add it to the PRNG.
  The program can then process the messages as usual.
  ```

  Besides BIP70, this is the last place we are directly using OpenSSL in the GUI code. All other OpenSSL usage is in [random.cpp](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp).

  Note that we are still also still doing other Windows specific gathering using [RandAddSeedPerfmon](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L268) and [RAND_screen()](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L600) on top of the other generation we do.

  Also note that if RAND_event returns `0` here (PRNG has **NOT** been seeded with enough data), we're just logging a single message and continuing, which also seems less than ideal.

ACKs for top commit:
  laanwj:
    ACK cc3b528
  MarcoFalke:
    unsigned ACK cc3b528
  theuni:
    ACK cc3b528.

Tree-SHA512: 0bb18779cf37f6670e3e5ac6a6a38e5f95199491b2684f9e56391c76f030fe1621d6df064239c2a398f228129fdf3f2220fc8cd15b2b92ecf2ea6d98a79b2175

cc3b528 gui: remove OpenSSL PRNG seeding (Windows, Qt only) (fanquake)

Pull request description:

  This removes the code introduced in [dashpay#4399](bitcoin#4399) that attempts to add additional entroy to the OpenSSL PRNG using `RAND_event()`. This is specific to bitcoin-qt running on Windows.

  ```
  RAND_event() collects the entropy from Windows events such as mouse movements and other user interaction.
  It should be called with the iMsg, wParam and lParam arguments of all messages sent to the window procedure.
  It will estimate the entropy contained in the event message (if any), and add it to the PRNG.
  The program can then process the messages as usual.
  ```

  Besides BIP70, this is the last place we are directly using OpenSSL in the GUI code. All other OpenSSL usage is in [random.cpp](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp).

  Note that we are still also still doing other Windows specific gathering using [RandAddSeedPerfmon](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L268) and [RAND_screen()](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L600) on top of the other generation we do.

  Also note that if RAND_event returns `0` here (PRNG has **NOT** been seeded with enough data), we're just logging a single message and continuing, which also seems less than ideal.

ACKs for top commit:
  laanwj:
    ACK cc3b528
  MarcoFalke:
    unsigned ACK cc3b528
  theuni:
    ACK cc3b528.

Tree-SHA512: 0bb18779cf37f6670e3e5ac6a6a38e5f95199491b2684f9e56391c76f030fe1621d6df064239c2a398f228129fdf3f2220fc8cd15b2b92ecf2ea6d98a79b2175

cc3b528 gui: remove OpenSSL PRNG seeding (Windows, Qt only) (fanquake)

Pull request description:

  This removes the code introduced in [dashpay#4399](bitcoin#4399) that attempts to add additional entroy to the OpenSSL PRNG using `RAND_event()`. This is specific to bitcoin-qt running on Windows.

  ```
  RAND_event() collects the entropy from Windows events such as mouse movements and other user interaction.
  It should be called with the iMsg, wParam and lParam arguments of all messages sent to the window procedure.
  It will estimate the entropy contained in the event message (if any), and add it to the PRNG.
  The program can then process the messages as usual.
  ```

  Besides BIP70, this is the last place we are directly using OpenSSL in the GUI code. All other OpenSSL usage is in [random.cpp](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp).

  Note that we are still also still doing other Windows specific gathering using [RandAddSeedPerfmon](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L268) and [RAND_screen()](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L600) on top of the other generation we do.

  Also note that if RAND_event returns `0` here (PRNG has **NOT** been seeded with enough data), we're just logging a single message and continuing, which also seems less than ideal.

ACKs for top commit:
  laanwj:
    ACK cc3b528
  MarcoFalke:
    unsigned ACK cc3b528
  theuni:
    ACK cc3b528.

Tree-SHA512: 0bb18779cf37f6670e3e5ac6a6a38e5f95199491b2684f9e56391c76f030fe1621d6df064239c2a398f228129fdf3f2220fc8cd15b2b92ecf2ea6d98a79b2175

cc3b528 gui: remove OpenSSL PRNG seeding (Windows, Qt only) (fanquake)

Pull request description:

  This removes the code introduced in [dashpay#4399](bitcoin#4399) that attempts to add additional entroy to the OpenSSL PRNG using `RAND_event()`. This is specific to bitcoin-qt running on Windows.

  ```
  RAND_event() collects the entropy from Windows events such as mouse movements and other user interaction.
  It should be called with the iMsg, wParam and lParam arguments of all messages sent to the window procedure.
  It will estimate the entropy contained in the event message (if any), and add it to the PRNG.
  The program can then process the messages as usual.
  ```

  Besides BIP70, this is the last place we are directly using OpenSSL in the GUI code. All other OpenSSL usage is in [random.cpp](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp).

  Note that we are still also still doing other Windows specific gathering using [RandAddSeedPerfmon](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L268) and [RAND_screen()](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L600) on top of the other generation we do.

  Also note that if RAND_event returns `0` here (PRNG has **NOT** been seeded with enough data), we're just logging a single message and continuing, which also seems less than ideal.

ACKs for top commit:
  laanwj:
    ACK cc3b528
  MarcoFalke:
    unsigned ACK cc3b528
  theuni:
    ACK cc3b528.

Tree-SHA512: 0bb18779cf37f6670e3e5ac6a6a38e5f95199491b2684f9e56391c76f030fe1621d6df064239c2a398f228129fdf3f2220fc8cd15b2b92ecf2ea6d98a79b2175

e892f96 random: remove call to RAND_screen() (Windows only) (fanquake)

Pull request description:

  Follow up to bitcoin#17151 where there were multiple calls to also remove our call to RAND_screen().

ACKs for top commit:
  MarcoFalke:
    unsigned ACK e892f96
  laanwj:
    ACK e892f96

Tree-SHA512: 1b846016d91e8113f90466b61fcaf0574edb6b4726eba1947549e2ac28907e1318d893f7b303e756f19730c8507c79b10e08d54b97153224b585ff1e0ac1953e

e892f96 random: remove call to RAND_screen() (Windows only) (fanquake)

Pull request description:

  Follow up to bitcoin#17151 where there were multiple calls to also remove our call to RAND_screen().

ACKs for top commit:
  MarcoFalke:
    unsigned ACK e892f96
  laanwj:
    ACK e892f96

Tree-SHA512: 1b846016d91e8113f90466b61fcaf0574edb6b4726eba1947549e2ac28907e1318d893f7b303e756f19730c8507c79b10e08d54b97153224b585ff1e0ac1953e