Revert "Remove http shortcut from LUA"

This reverts commit 4e77528c.

Lua http doesn't poll at all.

modules/misc/lua/vlc.c

@@ -83,6 +83,7 @@ vlc_module_begin ()
         set_description( N_("Lua Interface Module") )
         add_shortcut( "luaintf" )
         add_shortcut( "luahttp" )
+        add_shortcut( "http" )
         add_shortcut( "luatelnet" )
         add_shortcut( "telnet" )
         add_shortcut( "luahotkeys" )