Server rejects connection if some field are not set properly

The field was renamed in lavc54 and setting values changed from
enum to bitfield.
We don't need to care about this because VLC doesn't specify values.

Otherwise, it gets executed with /bin/sh which on Solaris does not support the
$(...) construct. This causes 'gmake check' to fail. For example:

../src/check_headers: $(dirname ../src/check_headers): does not exist

Calling check_headers with $(SHELL) explicitly makes use of CONFIG_SHELL.
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

Otherwise:

Undefined                       first referenced
 symbol                             in file
asprintf                            url.o
ld: fatal: Symbol referencing errors. No output written to test_url

This patch uses a mix of tabs and spaces to match the existing convention.
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

This reverts commit 93b21142.

This reverts commit e3511f67.

This reverts commit aeb250f7.

Close #6291

The same way as Wheel left/right, allow to use
those buttons for GUI shortcuts.

This reverts commit 07d38617.

macosx: hide the playlist without option click when showing the video in a separate window (refs #6213)

This is not so relevant anymore and was only a warning anyway.
(We cannot avoid the bug in LibVLC.)

Files were copied to contrib/src/src instead of contrib/src...

vlc_memalign data should be vlc_free'd

Close #6114 #6280

Close #6275
Close LP:943014

dlclose() a C++ plugin that was built with a faulty library that may have
registered __cxa_atexit callbacks (usually through the libstdc++ that
library was built with).

Upgrading libstdc++ is not always a solution since some code may have been
inlined and we can't get rid of it.