fix compilation issue
v4l2: remove debug log
x11_helper: include mediastreamer-config.h if existing
Do not automatically force keyframe when receiving PLI for VP8.
Generate VP8 keyframe when an invalid frame is reported and no reference frame has been acknowledged.
Fix last VP8 artifacts with AVPF enabled + add some debug traces.
Disable AVPF debug traces for VP8.
AVPF functions for videostream are not meant to be public (except for FIR).
fix bug in log and comment
Define ms_get_cur_time_ms().
Set the target upload bandwidth of streams in the RTP sessions.
add crypto line pseudo-parser
fix bad handling of audio rate in audio conference when opus codec is used on android.
fix sample rate logic again, to be robust to filters not implementing MS_FILTER_GET_SAMPLE_RATE
better management of ptime/bitrate at startup of opus encoder
Merge branch 'master' into dev_avpf
Do not change the rtcp report interval at the beginning of the call.

This mechanism is now handled in oRTP by using the RTCP send algorithm defined in the RFC 3550.
Merge branch 'master' of git.linphone.org:mediastreamer2 into dev_avpf