* Add Find to Routes interface

* Add example of using Routes.Find

* Rename find-pattern example

* And find_pattern middleware

* Refactor find-pattern example to use official FindPattern middleware

* Remove middleware.FindPattern for now

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Co-authored-by: jriddle <jriddle@axon.com>
Co-authored-by: Vojtech Vitek <vojtech.vitek@golang.cz>

* feat(): add CF-Connection-IP

* feat(): custom real ip header

#908

* fix(): typo

* refactor(): remove cf-connecting-ip from default headers

* refactor(): back to unexported default headers

The comment was meant to demonstrate how non-wildcard routes can match
wilecard routes, but there was likely a typo that made it incorrect.

* Fix condition in TestRedirectSlashes

* Improve test logs in middleware/strip_test.go

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Co-authored-by: Vojtech Vitek <vojtech.vitek@golang.cz>

…571)

* Fix typo in doc comment for Throttle middleware

* Add ability to specify response HTTP status code for Throttle middleware

* Fix Mux.Find not correctly handling nested routes

* Add more test cases for TextMuxFind

* Fix Mux.Find returning partial path for failing cases

Informational status in the range 100-199 may be sent multiple times, unlike statuses in the range 200-599.

This follows usage in the stdlib:
https://github.com/golang/go/blob/485ed2fa5b5e0b7067ef72a0f4bdc9ca12b77ed7/src/net/http/server.go#L1216

This reverts commit cbaac31.