Bug - Proto forwarded header not being seen by ASP.NET Core.

[bitbound]

Changes:

• Added Docker default host IP (172.17.0.1) to known proxies so it will accept all forwarded headers.
• Updated documentation.
• Fixed AudioCapturerWin so NAudio exceptions wouldn't cause Remotely to crash.
• Refactored AudioCapturerWin for performance.
• Set permissions on log file so non-elevated process can write to it.
• Replaced some static Logger calls with ILogger<T>.

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