Add copy of the GPL license.
Add copy of the GPL license.

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