o Provide rtpproxy_stop() function which sends specified signal to the proxy and waits for it to terminate itself by checking for the presence of the pidfile;
o Provide rtpproxy_stop() function which sends specified signal
to the proxy and waits for it to terminate itself by checking
for the presence of the pidfile;

o extend rtpproxy_start() to actually wait until pidfile is created
and has non-zero length.

dsanders11/rtpproxy,jevonearth/rtpproxy,hongbinz/rtpproxy,synety-jdebp/rtpproxy,synety-jdebp/rtpproxy,Vocalocity/rtpproxy-pre,synety-jdebp/rtpproxy,Vocalocity/rtpproxy-pre,Vocalocity/rtpproxy-pre,jevonearth/rtpproxy,hongbinz/rtpproxy,sippy/rtpproxy,sippy/rtpproxy,jevonearth/rtpproxy,synety-jdebp/rtpproxy,dsanders11/rtpproxy,sippy/rtpproxy,dsanders11/rtpproxy,jevonearth/rtpproxy,Vocalocity/rtpproxy-pre,hongbinz/rtpproxy,hongbinz/rtpproxy