Enabled to select monaural audio

For sites that bit rate is limited
Revert "Add workaround for broken TLS SNI in Windows 8.1 for the archive updater"

This reverts commit 9b657018c6e5e5024141fee1ef4c96e5389bfefb.
Re-enable librtmp recv() timeout
Calculate nvenc output buffer size based on bitrate
Fix NVENC reference counting if encoder initialization fails
Added a small visual indicator for global sources in sources listview
Fix translation string, setting was moved from advanced to encoding
Merge pull request #315 from shousa/master

Enabled to select monaural audio
Add an actual Default NVENC preset, which selects the preset based on resolution and fps for best quality
Add non-cbr mode with quality support to nvenc