Changes:

• #2212 preview in embed.html for all players
• recompiled avcodec.so with proper glibc
• #3100 handle aspect option for nvenc
• #3222 now server API call will return total_bandwidth only for output bandwidth.
• #3241 fix HTTP 500 when requesting dash segment for segment starting from non-keyframe
• #3285 old api call config_stream_create now will overwrite stream, not update it
• #3352 [UI] don't hide stream while dragging it
• #3367 fix desync when using m4s with bad time on server
• #3369 enhance multiple transcoder startup on slow hardware
• #3371 bypass tokens into DASH manifest
• #3377 save aliaser info to config
• #3378 send unaliased user stream name to session push event and to mysql API
• #3380 fix ac3 in m4s