Add automatic renomination

[kevmo314]

Description

Adds automatic renomination as an ICE agent option which allows the ICE agent to switch to the best available link. The logic for this was scoped out of libwebrtc, which also has a 3s polling interval and continuously pings candidates.

The example is probably the best way to see how this feature works. It establishes two virtual links and then you can see it switch between them based on the RTT, which is controlled by the user.

Reference issue

Fixes #...

[codecov]

Codecov Report

❌ Patch coverage is 66.12903% with 63 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.82%. Comparing base (649e13a) to head (4c025bf).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
selection.go	42.37%	33 Missing and 1 partial ⚠️
agent.go	74.33%	23 Missing and 6 partials ⚠️

❌ Your patch status has failed because the patch coverage (66.12%) is below the target coverage (70.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #822      +/-   ##
==========================================
- Coverage   87.61%   86.82%   -0.79%     
==========================================
  Files          43       43              
  Lines        4537     4706     +169     
==========================================
+ Hits         3975     4086     +111     
- Misses        392      444      +52     
- Partials      170      176       +6     

Flag	Coverage Δ
go	86.82% <66.12%> (-0.79%)	⬇️

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[JoeTurki]

works great on nixos :)
going to test on windows tomorrow :)

[JoeTurki]

This is awesome. I had a lot of fun playing with it and testing it everywhere. I tried the controlling-agent example on Linux, macOS, and Windows (was so tricky). I also read through the libwebrtc implementation.

this is really cool.

[JoeTurki]

Since we're dropping this config in the next major release, maybe let's stick with the options. If users want the new feature, they can move to the new API.
What do you think?

[kevmo314]

Makes sense to me! Removed.

[JoeTurki]

Will be cool if we provide a docker image with this example, I made a scuffed one while i was testing, can clean and commit it :)

[kevmo314]

Yeah that would be helpful! Can you push yours?

Definitely the hardest part of testing this is the networking setup.

[JoeTurki]

Yeah that would be helpful! Can you push yours?

cool, I'll make a PR.