FS-7550 quick and dirty tweak for overlay, maybe need furthur tweaks but this should work with most transparent pngs

Use it to add an image to the write stream to see a recording banner on video echoed back to you during recording.
ARGS: <file> [<position>] [<opacity 0-255>]

POSITIONS:
left-top
left-mid
left-bot
center-top
center-mid
center-bot
right-top
right-mid
right-bot

<extension name="example">
  <condition field="destination_number" expression="^overlay$">
    <action application="answer"/>
    <action application="video_write_overlay" data="/path/to/img.png"/>
    <action application="record" data="/data/file.mp4"/>
    <action application="stop_video_write_overlay"/>
   </condition>
</extension>

FS-7513 improve auto bandwidth feature and add other performance improvemnts related to dropping video when its not visible

FS-7499 some mods to relad/recover in rtp.  Killing dtls here might be unsafe and isn't necessary anyway

FS-7500: set 500ms min on retransmit of outdated xml based intraframe request that EVERYTHING still seems to use

remote_media_ip_reported => remote_audio_ip_reported and remote_video_ip_reported
new vars remote_audio_ip and remote_video_ip like remote_media_ip but specific to audio and video
remote_media_port_reported => remote_audio_port_reported and remote_audio_port_reported
remote_media_port => remote_audio_port and remote_video_port
rtp_auto_adjust => rtp_auto_adjust_audio and rtp_auto_adjust_video

FS-7499 FS-7513 video mute the old way seems to break chrome when resuming, add some improvements to mitigate

FS-7499 FS-7500 FS-7508 FS-7513 trying to improve the video signal decoding under stress and get vpx to latch on to a signale sooner

FS-7509 update the verto demo to init properly with new $.verto.init() so resolutions and devices can be parsed properly

FS-7338 #comment disable mod_bv by default since the lib is not available on all supported platforms

FS-7500: switch_img_overlay now support ARGB and negtive position, also change alpha value to match doc description