mod_portaudio: fix shared stream output device validation/initialization that caused segfault and portaudio errors

fix segfault due to typo in uuid_outgoing_answer

do not warn about ring device since is acceptable to not have one

               add tons of comments to default portaudio.conf.xml for streams and endpoints

               fix pablio multiplexing

alter implementation of renegotiate codec on hold feature to still take other sdp elements into consideration

FS-3127 --comment-only can you try this patch first to see if it fixes it without any changes to mod_cc