osdmenu: Reverts [22062] which was a revert of [22061], and gives the .cfg the same name than the directory.

Win32 installer: save language used in installer for uninstaller. "[PATCH] saves the chosen language of the installer in the registry..." by Hannes Domani

(actually it might be my code)

Otherwise, it'll screw up completely when we add vlc_cond_timedwait

Not particularly clean, but we need to pass the exit request from libvlc
to the actual interfaces and inputs somehow...