Add sequence number that is monotonically increase and optional origin parameter to be set on the instantiation time.
Add sequence number that is monotonically increase and optional origin
parameter to be set on the instantiation time.

synety-jdebp/rtpproxy,jevonearth/rtpproxy,jevonearth/rtpproxy,dsanders11/rtpproxy,jevonearth/rtpproxy,synety-jdebp/rtpproxy,synety-jdebp/rtpproxy,synety-jdebp/rtpproxy,dsanders11/rtpproxy,sippy/rtp_cluster,sippy/rtpproxy,dsanders11/rtpproxy,sippy/rtp_cluster,jevonearth/rtpproxy,sippy/rtpproxy,sippy/rtpproxy