Merge commit '6b58e11a8331690ec32e9869db89ae10c54614e9'

* commit '6b58e11a8331690ec32e9869db89ae10c54614e9':
  rtpproto: Add an option for writing return packets to the address of the last received packets

Merged-by: Michael Niedermayer <michaelni@gmx.at>

diff --cc libavformat/rtpproto.c
Simple merge