This lifts the PATH_MAX characters limit, and should fix encoding on
POSIX non-UTF-8 systems.

Decoders are never "killed", so this had no effects.

(Same reasons as VLC_OBJECT_AOUT)

Audio output is not a descendent of input thread, so there was no real
use for this object type anymore.

macosx: make sure that we don't block media keys for iTunes in case the user doesn't want to use them within VLC

Changing this option requires a relaunch now, which is automatically offered when needed.

Fixes #5025

3gp4 is not compatible to isom, while 5, 6 and 7 should be
Ref #4979

This doesn't help users to report issues...

Without this, libvlc_media_parse() will deadlock on non-file items.

Also fix indentation (4 spaces)

This has no effects, so lets not do it.

Change the MacOS GUI to trigger the fade of all the displays to black
when entering & leaving full screen mode only if the "Black out other
displays" preference is set.
Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>