* Changed libdvdcss API to force binary incompatibility. Yeah, this is
    evil, but if we don't do it now we'll have to do it when more people
    are using it.
  * Fixed minor libdvdcss stuff such as the soname and compilation flags.
  * New --with-dvdcss flag.
    Explanation:
     o default: build libdvdcss, statically link vlc against it.
     o --with-dvdcss=no: build libdvdcss, dynamically link vlc against it.
     o --with-dvdcss=yes: don't build libdvdcss, use already installed one.
     o --with-dvdcss=/foo: don't build libdvdcss, use libdvdcss from /foo/*.
    (this looks a bit strange to me, I'll find better flag settings)