net/liveMedia: update to 2019.12.05

2019.12.05:

• Fixed a memory leak in the RTSP "REGISTER" command implementation (that I had failed to catch in the previous release).

2019.12.04:

• Fixed a couple of memory leaks in the RTSP "REGISTER" command implementation. (Thanks to Micha Kalfon for noting this.)
• Changed to protection of the member function "setSDPLinesFromRTPSink" in "OnDemandServerMediaSubsession" from "private:" to "protected:".
• Performed the annual update of the copyright years near the start of each file