GUACAMOLE-495: Update guacenc mangpage - the MPEG-4 output is no longer a raw stream.
GUACAMOLE-495: Update guacenc mangpage - the MPEG-4 output is no longer a raw stream.

glyptodon/guacamole-server,apache/guacamole-server,mike-jumper/incubator-guacamole-server,apache/guacamole-server,mike-jumper/incubator-guacamole-server,glyptodon/guacamole-server,apache/guacamole-server,mike-jumper/incubator-guacamole-server,glyptodon/guacamole-server,mike-jumper/incubator-guacamole-server