Support standard streamid syntax

[calanor]

Support the streamid access control methods as defined in the SRT
https://github.com/Haivision/srt/blob/master/docs/features/access-control.md

#!::m=(request|publish),r=(stream-key),u=(user),s=(password)

Maintains compatible with current syntax.

[iSchluff]

Looks pretty good,
Can you please also add some parsing tests for the new streamid format?

[gpmidi]

I'm working on unit tests for this and noticed that the TestServerImpl_GetStatistics test fails. The tl;dr is that it's old vs new format. I can either update the test to use the SRT defined spec or figure out a way to base the answer on what was sent to the server in the first place. Thoughts?

=== RUN   TestServerImpl_GetStatistics
    server_test.go:52: Invalid stream statistics: got {s1 srt://testserver.de:1337?streamid=#!::m=request,r=s1 2 2024-11-25 14:48:26.374969306 -0500 EST m=+0.000745398}, expected {s1 srt://testserver.de:1337?streamid=play/s1 2 2024-11-25 14:48:26.374969306 -0500 EST m=+0.000745398}
--- FAIL: TestServerImpl_GetStatistics (0.00s)

My working branch is here.

[gpmidi]

@iSchluff I'd recommend we close this in favor of #43 at this point.