Merge "bridge_softmix / res_rtp_asterisk: Fix packet loss and renegotiation issues."

apps/app_confbridge.c

apps/confbridge/conf_config_parser.c

apps/confbridge/include/confbridge.h

bridges/bridge_softmix.c

bridges/bridge_softmix/include/bridge_softmix_internal.h

configs/samples/confbridge.conf.sample

include/asterisk/bridge.h

include/asterisk/frame.h

main/bridge.c

main/rtp_engine.c

res/res_pjsip_session.c

res/res_rtp_asterisk.c