ToIP doesn't work with QUIC/WS/etc. addresses

[Stebalien]

Currently, it uses ToNetAddr. However, apparently, ToNetAddr will only return TCP/UDP addresses for actual TCP/UDP multiaddrs, not multiaddrs that simply start with TCP/UDP. That is:

• /ip4/.../tcp/... will work.
• /ip4/.../tcp/.../ws won't.

Ideally, we'd fix #67 then just fix ToIP by using that new function.

[Stebalien]

@willscott I'm concerned this could interfere with AutoNAT. It's not a super-high priority, but we should fix it. I only realized this was an issue while trying to implement a different feature and running head-first into this one.