A bunch of fixes from production usage #4

[dimhotepus]

• Allow to configure RTSP client inactivity timeouts for server streams.
• Use .net core way to enable unicast port reuse for socket.
• Thread-safe access to state shared between server and maintaining threads.
• Disposable uses Interlocked API and int to speedup on old x86 32 bit architecture.
• Do not busy wait for 100 cycles during waiting for events. It is too long and consumes CPU time.
• Speedup thread-safe empty queue checks.
• Do not wait for events in queue for 1 microsecond. There are no streams with 1000000 * N FPS and such small wait time creates unneeded CPU load. Allow to configure how much time to wait and use 1 millisecond as default.
• Do not lose exception stack traces in logs. Hard to debug issues when no stack traces.

[juliusfriedman]

Looks good to me!

I will be away from keyboard for a few hours but when I return I will confirm changes and merge.

Thanks again for your contributions!

[juliusfriedman]

All changes LGTM!

Testing confirms everything is still working!!

Thank you for your contribution!!!

[juliusfriedman]

Thanks again for your contributions!

The only thing I notice is that since we no longer run the old tests its possible something could sneak up during refactoring

I will probably get started moving most of the tests to a proper unit tests solution in due course so the unit tests can be run in the pipeline as part of build.

Thank you for your contributions!