main/mpd: upgrade to 0.19
main/pcre: upgrade to 8.36
main/protobuf: upgrade to 2.6.0
main/protobuf-c: upgrade to 1.0.2
main/mosh: rebuild with protobuf-2.6
testing/mumble: rebuild with protobuf-2.6
testing/bitcoin: rebuild with protobuf-2.6