rtpcodecspecific: Support G.729 annexb=yes correctly
rtpcodecspecific: Support G.729 annexb=yes correctly

The parameter restricts the codec, so it has to be kept even if only
one side supports it.

tieto/farstream,kakaroto/farstream,pexip/farstream,pexip/farstream,ahmedammar/skype_farsight2,kakaroto/farstream,tieto/farstream,shadeslayer/farstream,kakaroto/farstream,shadeslayer/farstream,ahmedammar/skype_farsight2,ahmedammar/skype_farsight2,kakaroto/farstream,tieto/farstream,ahmedammar/skype_farsight2,pexip/farstream,shadeslayer/farstream,pexip/farstream,tieto/farstream,shadeslayer/farstream,tieto/farstream