This reverts commit a9e4799e.

Add services discovery support and enhance playlist support for lua interface modules. Added "search", "sort" and "sd" commands to rc.lua. Restored true playlist functionality and sd selection in the lua http intf.

 * share/luaintf/http.lua: Equivalent of the legacy modules/control/http/
   module. (The new module takes 272 lines of Lua, instead of 5475 lines for
   the old one.) Functionality is basically the same except for CGI support
   which is missing.
 * share/http-lua/: The HTML files using the new <?vlc [lua code] ?> syntax.
 * modules/misc/lua/: Add Lua bindings for a few VLC function, the most
   important being the HTTPd high level functions, ACLs, stat and opendir.

The Lua code still needs to be cleaned up a bit.

I really don't like the Sort menu and Services discovery menu code. If
someone has a better idea feal free to change it.

interface should be done pretty soon (i'll try to finish it tomorrow)

 vlm.html : vlm web interface. What works: sending broadcast and vod creation
            commands

 js/vlm.js : add code to handle sending vlm commands.

 requests/vlm_cmd.xml : used to send a vlm command and get the resulting
                        error message

 requests/vlm.xml : export the full vlm media/schedules "tree". I still need
                    to parse that in js/vlm.js in order to display it in
                    dialogs/vlm .

 dialogs/* : dialogs' code which is used as building blocks for the
             main pages. (in order to avoid code duplication)

 mosaic.html, js/mosaic.js, dialogs/mosaic : start of a mosaic help
            page. nothing works and it's almost empty but i didn't feel like
            sorting through the commited files.