Add argument to module_GetModulesNamesForCapability (and services_discovery_GetServicesNames) to also get the longnames.

Fix module_GetModulesNamesForCapability() and make it handle submodules properly (ie: the shoutcasttv submodule is returned as "shoutcasttv" instead of "shout"). This function (or its services_discovery_GetServicesNames(p_this) specialised version) should be used in interfaces, instead of the current code duplication.

Please report loudly any regression, using spdif or not.

configure.ac: Because of the ld text relocation bug on Mac OS X, we have to disable ffmpeg when using such linker for the time being. Add a big warning at the end of configure if we are in such a configuration.

 * 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.

contrib/ffmpeg-macosx-intel-mmx.patch: Use Graham Booker's patch which works around the ld64 text relocation bug.

* disable ASM support in libtheora for now (until the authors release a fixed version or Apple a fixed ld)