Use variables instead of values for pid-file and lock-file
Use variables instead of values for pid-file and lock-file

Signed-off-by: Peter Lemenkov <2f981fc861bda8c748898150c942841af4296212@gmail.com>

kiryu/rtpproxy,viraptor/RTPproxy,viraptor/RTPproxy,synety-jdebp/rtpproxy,Vocalocity/rtpproxy-pre,gtkiller/rtpproxyd,hongbinz/rtpproxy,miconda/rtpproxy,hongbinz/rtpproxy,hongbinz/rtpproxy,jevonearth/rtpproxy,jevonearth/rtpproxy,mab-netdev/rtpproxy,DrumTechnologiesLtd/rtpproxy,DrumTechnologiesLtd/rtpproxy,Vocalocity/rtpproxy-pre,dsanders11/rtpproxy,synety-jdebp/rtpproxy,dsanders11/rtpproxy,synety-jdebp/rtpproxy,sippy/rtpproxy,mab-netdev/rtpproxy,kiryu/rtpproxy,DrumTechnologiesLtd/rtpproxy,kiryu/rtpproxy,dsanders11/rtpproxy,Vocalocity/rtpproxy-pre,hongbinz/rtpproxy,Vocalocity/rtpproxy-pre,synety-jdebp/rtpproxy,mab-netdev/rtpproxy,jevonearth/rtpproxy,jevonearth/rtpproxy,sippy/rtpproxy,sippy/rtpproxy,miconda/rtpproxy,gtkiller/rtpproxyd,miconda/rtpproxy