Changes from 28/6/2014.

Changelog:
2014.06.28:
- Fixed another bug in the RTSP server's handling of incoming Base-64-encoded requests.

2014.06.27:
- Fixed a bug in the RTSP server's handling of incoming Base-64-encoded requests (when handling
  RTSP-tunneled-over-HTTP) that get split over more than one network read.
  (Thanks to Piers Hawksley for the reporting the problem, and providing diagnostic output to
  help track down the bug.)
- Made the RTP/RTCP-over-TCP implementation more robust, by stopping all use of the socket
  if any write to the socket should fail.