- acceptance of 2nd call while putting the others on hold
- creation of another outgoing call while already in call
- blind call transfer
- - attend call transfer
+ - attended call transfer
* improve bandwidth management (one b=AS line is used for audio+video)
+ * improvements in the echo limiter
* stun support bugfixes
* possibility to use two video windows, one for local preview, one for remote video (linphonec only)
* optimize by not re-creating streams when SDP is unchanged during a reinvite