Extend -v command to also report supported extensions.
Extend -v command to also report supported extensions.

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