This hack is not needed anymore.

refs #14362
This reverts commit 5598f816.

- cleanup interfaces section
- Regroup settings, move some to video section
- remove rarely used settings from the simple settings page
- reorder outlets and setup code

close #14504

mwait (called from Audio and SPU DecoderThread) can now be interrupted when
flushing or closing.

This fixes a too long closing/flushing time when the next spu or audio block is
too distant.

For now, a lot of decoder/packetizer are also flushing on
BLOCK_FLAG_DISCONTINUITY flag. Some others are also flushing on
BLOCK_FLAG_CORRUPTED flag (omxil, videotoolbox, avcodec audio).

This patch doesn't change the current behavior.
But maybe we shouldn't flush anymore on DISCONTINUOUS/CORRUPTED.

and possibly uninitialized

Would be nicer to rebuild SPS/PPS on the fly as most
of the parameters are the same, but dealing with
matrixes adds too much code :/

Boxes/atoms functions are unrelated to bitstreams.

Arial is not available on anything but OS X

Fix #14976
This also removes multiple ununsed url parsing

If thread cancel is disabled and cancel is requested, it causes a tight
infinite loop eating up CPU in cancellation points such as vlc_join(),
vlc_cond_wait() and vlc_cond_timedwait().
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

If byterange request is done and reply does not provide
content-length reply, read will block due to keepalive.

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>