* LK-105 (Opus DTX)
https://linear.app/livekit/issue/LK-105/allow-enabling-of-opus-dtx
Enable/Disable Opus DTX using SDP answer based on setting in
`AddTrack` request.
Testing:
--------
Chrome and Firefox work. Having audio problems with Safari
(maybe the Safari 15 issue as I am not getting media)
* Check that receiver has no tracks
* Skip non-audio transceivers
* A small clean up to not use pendin track outside lock and also append with spread
* Address comments from review by David
* Update pkg/rtc/participant.go
Co-authored-by: David Zhao <david@davidzhao.com>
* Pull in tagged version of webrtc and lk protocol
Co-authored-by: David Zhao <david@davidzhao.com>
* cli: Allow setting the current node region with flag or env variable
Also add region to "starting LiveKit server" log.
* routing: Add region to node registration
Register the node's region on the selected router so it can be used for
region aware node selection.
Also add the region to the list-nodes output.
* regionaware: Set minDist to zero for the current node
If you don't set the minDist when leaving the loop early for a node that
matches the current region, the minDist value with still be at max. This
causes the the wrong node to be selected if the current node is the
first one the loop passes through.
Add a test that validates this change. The new test fails if this new
change is not in place.
* aws ami
* cloud-init from base ami
* rename
* readme and ubuntu cloud-init
* nginx ssl termination
* small readme fixes
* nginx on ubuntu cloud-init
* better default config, nginx websocket config
* small change to readme
* packer does not need to start services
* standardize nginx config
* path fixes
* small fixes
* end line return
* move readme to docs repo
* remove lk-image cloud-init and bake into ami
* Disallow AddTrack from participants that don't have the permission
* Support protocol 3 speaker updates, client info
* update protocol
* Disallow AddTrack from participants that don't have the permission
* increase wait time for GH to pass
* prestop and hasparticipants in interface
* add prestop function to existing routers
* fakerouter prestop
* update protocol version
* read lock
* redis router graceful stop
* test fix
* force stop
