New function vlc.input.item(): returns a pointer to the current input_item

The object returned by vlc.input.item has the following members:
 - item:metas(): similar to vlc.input.metas
 - item:set_meta(name, value): change a meta. Eg: set_meta("artist", "ZZ")

Returns a table with (max.) 17 meta data about the current input

Load a subtitles stream given its URI

>= 0 means success (could be the new offset)
-1 = error

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

This bug is fixed in alsa-lib git repository. Depending on the
underlying ALSA driver, re-opening the sound card might fail if VLC
forked and executed another process. This is especially bad with
xdg-screensaver, although this could affect other -earlier- usages
of fork+exec or posix_spawn.

Signed-off-by: Laurent Aimar <fenrir@videolan.org>

This fixes compilation on WinCE, where signal.h is missing

This will render the plugins cache locale-independent.

Remove useless patch and update arch parameters