uvgRTP v2.2.0

This release focuses on finalizing RFC 3550 RTCP.

New Feature

• RTCP BYE packets are sent when exiting
• Handling received RTCP BYE packets and timing out inactive RTCP sources
• New example program for synchronizing audio and video streams
• RTCP reporting interval is calculated according to RFC 3550
• RTCP reporting interval can be manually set via RCC_SESSION_BANDWIDTH context flag
• rtcp: add hooking for sending APP packets by @wowaser in #187
• config: allow for custom SSRC. Added thread safety by @wowaser in #185

Fixes

• RTP timestamps in RTCP Sender Reports are calculated according to RFC 3550 (stream synchronization)
• Fraction lost field in RTCP Sender Reports is calculated correctly
• rtcp: add thread safety for participants_ data structure by @wowaser in #188

Known issues

• Multithreaded use of ZRTP only supports at most two streams reliably
• No IPv6 support yet

Full Changelog: v2.1.2...v2.2.0