- Add rtcp boolean to emit RTCP SR

Edit mediainfo so you can edit meta-data even when playitem changes in
background. Also sets default to readonly, so user can't change meta if
he/she doesn't want to edit it. First try ;)

Patch by Ilkka Ollakka, modified by myself to rip-off extra spaces, to modify a constant one and not 4 times, and functions placement in the code.

Doesn't fix input memleaks (playlist.m:204-214)

Fix [21193]

Fix warning in id3tag.

vlc_input.h: Disable's funman commit. It requires more work before going in trunk. Current state dead locks.

audioscrobbler.c: Fix 21193. It should be reverted or at least the lock shouldn't be held until it gets fixed.