Usage:

$ vlc concat:// :concat=URL1,URL2,....URLn

Note: As for the existing input-slave and input-list options, URLs are
assumed to not contain unencoded commas. This is usually the case but
not strictly warranted as the comma is a sub-delimiter.

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

SetThreadErrorMode() is necessary for correct plugin loader semantics,
but it is only available on Windows 7 and later, so it needs to be
loaded at run-time if it is to be used. On Windows 2008 and older,
a fallback is provided to the extent possible.

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

trim exposed class API, remove code which does not belong in a view object, remove macro abuse