Supports webrtc interface filtering on server

[PieterFabry]

For security and ICE optimization purposes, it would be good to add the ability to restrict ICE candidates on the server based on the network interfaces available. This is a common feature for WebRTC servers.

Usage:

Added a webrtcICEInterfaces interface to the mediamtx.yml under webrtc.
webrtcICEInterfaces takes in a string array of the network interfaces available on the server for ICE candidate resolution to happen.

eg:
webrtcICEInterfaces: [ "eno1", "enp2s0"]

The string array is then applied on the SetInterfaceFilter method in pion.
//https://pkg.go.dev/github.com/pion/webrtc/v3#SettingEngine.SetInterfaceFilter

[aler9]

Hello, yes, normally the server sends the list of all its local IPs to clients, and this option allows to filter this list.

Change the code in order to fix CI errors and this will get merged. Thanks.

[codecov]

Codecov Report

Merging #2460 (255e5e9) into main (a6f929d) will decrease coverage by 0.39%.
Report is 6 commits behind head on main.
The diff coverage is 33.33%.

@@            Coverage Diff             @@
##             main    #2460      +/-   ##
==========================================
- Coverage   61.89%   61.50%   -0.39%     
==========================================
  Files         129      130       +1     
  Lines       14540    14645     +105     
==========================================
+ Hits         8999     9008       +9     
- Misses       4871     4965      +94     
- Partials      670      672       +2     

Files	Coverage Δ
internal/conf/conf.go	75.96% <100.00%> (+0.10%)	⬆️
internal/core/core.go	86.16% <100.00%> (+0.04%)	⬆️
internal/core/webrtc_source.go	50.44% <100.00%> (ø)
internal/core/webrtc_manager.go	57.53% <9.09%> (-1.79%)	⬇️

... and 7 files with indirect coverage changes

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[aler9]

merged, thanks!

[aler9]

added in v1.2.0