Test input plugin question

Hi Petri, Torsten,

I have some questions about the test input plugin.

 From a distro package maintainer pov, I don't think there's much use to 
ship this plugin to distro users. Possibly it could have some use in the 
-devel sub-package, but I'm not even sure about that ? It's probably 
just an annoyance taking space in the xine-ui control panel for most people.

Before the builtins feature was introduced (rev 12776), as it was in its 
own file, it could at least be segregated to an optional sub-package, 
but now that is not possible anymore, unless passing 
--disable-libxine-builtins to configure. That may be a solution to my 
concern, but it means loosing the optimization that comes with the 
builtin feature.

I'm probably going to do just that for now, but probably something more 
subtle can be done.
Maybe the test input plugin can be removed from the builtins ?
Maybe kept into builtins but made optional through a configure switch ?
Maybe removed from builtins and made optional ?
Something else ?
I'm not sure which option would have your preference, what do you think ?

Regards,
Xavier