Add 'cseq' and 'call_id' attributes to OutgoingRequest.
Add 'cseq' and 'call_id' attributes to OutgoingRequest.

Voiceworks/SIP.js,onsip/SIP.js,joseph-onsip/SIP.js,vconsult/JsSIP,Escaux/SIP.js,dpocock/JsSIP,markandrus/SIP.js,DrumTechnologiesLtd/JsSIP,CodeYellowBV/JsSIP,rusekr/JsSIP,ronlobo/SIP.js,AaronZhangL/JsSIP,tqcenglish/JsSIP,voxbone/JsSIP,onsip/SIP.js,josephfrazier/SIP.js