Close #2434

Maybe this shouldn't be in the interface, but in the playlist...

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

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

As stated in NEWS, VLC will not work on XP < SP2 and 2003 < SP1

This is a partial revert of [6fdf44fd]

Should close #4011

MessageBoxA() isn't supported on WinCE

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

Preparation for adding assembly hue/saturation processing functions

Two new function pointers in p_sys to clipping and non-clipping U and V channel processing cycle
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

If we are going to create a window just to print an error message, I
think a native message box is nicer.

--miface-addr mostly did not work as --miface was supposed to be used
instead.

 * Do not force definitions on Windows so that compilation works with
   all variants of MingW (this may break IPv6 SSM with old compilers).
 * Do not fall back to legacy IPv4-specific ioctls if RFC3678 is
   supported. This avoids compiling dead code and works around issues
   with Linux kernel headers (especially Android).
 * Do not attempt to set multicast interface with legacy IPv4 ioctls.
   It is not very clear whether this is the address or the index.
   Also, "--miface-addr" was very confusing as it was mostly ignored in
   favor of "--miface".