Removed suspicious hardcoded authentication in stun server function. Instead we consider a message valid if it has a username set.
Removed suspicious hardcoded authentication in stun server function.
Instead we consider a message valid if it has a username set.

carpikes/ortp,Distrotech/oRTP,jiangjianping/ortp,videomedicine/oRTP,VTCSecureLLC/ortp,carpikes/ortp,caizw/ortp,caizw/ortp,Distrotech/oRTP,videomedicine/oRTP,Linphone-sync/oRTP,jiangjianping/ortp,Linphone-sync/oRTP,VTCSecureLLC/ortp,wugh7125/ortp,videomedicine/oRTP,Linphone-sync/oRTP,wugh7125/ortp,wugh7125/ortp,VTCSecureLLC/ortp,caizw/ortp,jiangjianping/ortp,carpikes/ortp,Distrotech/oRTP