protobuf-c: Add license information.

Signed-off-by: Jacob Siverskog <jacob@teenageengineering.com>
ocserv: use the system's protocol buffers by default

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>
ocserv: updated to 0.8.4

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>
Merge pull request #254 from jsiverskog/protobuf-c_add_license2

protobuf-c: Add license information.
mpd: disable Opus codec support

Signed-off-by: Nicolas Thill <nico@openwrt.org>