Fix. Remove an extra Allow header sent on re-INVITEs
Fix. Remove an extra Allow header sent on re-INVITEs

voxbone/JsSIP,rusekr/JsSIP,dpocock/JsSIP,AaronZhangL/JsSIP,DrumTechnologiesLtd/JsSIP,tqcenglish/JsSIP,vconsult/JsSIP