We don't need it, and already have a function webrtcIsReady that tells
us what we need to know (whether a datachannel was opened before the
timeout period).
The only place it was used was in window.onpageunload, and we have a
better way of determining if the proxy is active there (through the ui).
I also removed that code from the webextension since the proxy won't
stop running unless you close the browser and after testing it looks
like that code doesn't notify the user anyway.
Because the timeout makes the pair inactive, we should check for this
state in onopen before connecting to the client. Updated tests to set
the proxy pair to active before testing onopen. Also removed a
redundant statement.
This is similar to the deadlock bug in the proxy-go instances. If the
proxy-pair sends an answer to the broker, it previously assumed that the
datachannel would be opened and the pair reused only once the
datachannel closed. However, sometimes the datachannel never opens due
to ICE errors or a misbehaving/buggy client causing the proxy to
infinitely loop and the proxy-pair to remain active.
This commit reuses the pair.running attribute to indicate whether or not
the datachannel has been opened and sets a timeout to close the
proxy-pair if it has not been opened by that time.
Some files were omitted in the .eslintignore, left as an exercise to the
reader.
We probably want to reduce amount of globals overall and use proper es
modules.
