"///REGISTER" causes Call-ID mismatch

[cyclingzealot]

Just a note that the ///REGISTER string in

Call-ID: [call_id]///REGISTER

at https://github.com/rkday/sipp-samples/blob/master/uac-auth.xml#L60

caused me some issues. sipp could not match responses to sent messages and thus was repeating the message. https://stackoverflow.com/questions/61262689/sipp-keeps-resending-message

I can attest that removing ///REGISTER fixed it for me. Wether I was doing something else that would cause such a behavior (wrong line return character?), I do not know at this time. Not t being a sipp expert, I defer to expert opinion if this is truly a bug or not.

My sipp version string is SIPp v3.6.0-4-gcc24f9d-TLS-SCTP-PCAP-RTPSTREAM.