Refresh stale connection faster

Refresh stale connection faster

don't set peer connection if the signaling state is closed

we close pc and clean it when signaling state is closed

Make accept request become async

In the state machine, when send accept request, we don't have to wait the response back from service side before moving to talking state.

Reduce idle timeout and refresh idle connection

1. Reduce idle timeout to 9 minutes
2. Refresh connection after idle timeout

Setting ptime to constant

Setting ptime to constant

v1.1.6

clear early peer connection when network went offline

v1.1.5

Rtc peer connection factory to manage peer connections

v1.1.4

1. handle empty ice candidate generated by Firefox 69.0b3
2. Support externalWssManager for singaling
3. set zero as a string value for usedtx

v1.1.3

1. Override sdpSemantics to plan-b
2. Support unencrypted RTP

v1.1.0

• Add automatic retry for failed RTC signaling connections.