chatting with Juan Bennet at c-base, Berlin about Tor onion service integration

here's what we've identified as necessary for proper Tor integration:

1. adding /onion to go-multiaddr - /onion/<onion-key>/ipfs/<ipfs-key>
2. adding /onion dialing to go-multiaddr-net
3. make a build of go-ipfs that:

• only uses /onion
• only bootstrap to onion nodes
• disable mdns service
• disable NAT service

I know plenty of people who'd be willing to run some Tor onion bootstrap nodes.

(edited by @jbenet for links)