RFC6062 TURN TCP allocations

[seankhliao]

Description

Implements both client and server side support for TCP allocations and connections to peers.

Things to do:

• tests, what to test?
• add example(s)
• review/break out use of syscalls for port reuse
• review double lookup internal/server/turn.go

Reference issue

Fixes #143, #118

[GingerAdonis]

Great to see you've implemented TCP support! I'll definitely test this within a couple of weeks.

Edit: Oh wait. I thought seankhliao was Sean from reddit. But that's Sean-Der. Anyways, great work! 👍

[Sean-Der]

This is amazing! Nice work @seankhliao I am reviewing now :)

I don't have access to a computer for another day or two so will be slower then usual sorry :(

[kylecarbs]

@Sean-Der is there anything I can do to help this get merged? 🙌

[GingerAdonis]

@Sean-Der Did you get around testing these changes?

[GingerAdonis]

Bump. This is a highly useful PR.

[seankhliao]

I'm going to close this as:

1. I've lost all context for this
2. the underlying codebase seems to changed quite a bit

If anyone wants to work on this, feel free to base it off this code (if it's still useful)