mozilla: don't hold any reference to root object to prevent ownership issues on plugin destroy, just create it and throw it to the wilderness

rss.c: Using [19378] (visible region persitence in freetype font renderer), only display one line of text if the font size option was set.

Change the visible heigh/width only if they weren't set in the source text subpicture. Else use the original values. Could someone with good knowledge of the freetype module (and maybe other text render modules ... if we have any) confirm that this change is ok?

* Fix CFG_PREFIX for config chain parsing and option names (s/rrs/rss/)

Disable ffmpeg GIF decoder. It's currenly not working (doing some weird infinite loop when calling pf_decode_video in src/misc/image.c ImageRead() when using the RSS plugin)

Qt4 - Open. Fix segfault under windows. Still need to find out to hide those buttons under windows. But one at a time.

 - mozilla: I finally figured out why firefox was corrupting memory after destroying plugin (so much fore reference counted objects !)

Open Dialog: status. 
- Broken on Windows.... As usual...
- Filters are not correctly set. Why ? I don't understand...
- Alignement will not be better.
- Show/hide advanced panel and subtitles do not work correctly (none of them)
- Additional features will be for next release. There is plenty of things to do left.

/* GOSH I hate QT designer */

When using -p <module name> (or --module <module name>) to look for help, also check if the module name matches a module's shortcut (and not only the main name). Makes it possible to use stuff like vlc -p udp instead of vlc -p access_udp.

Bumped up version number of live555 to a ridiculous 9999999999 so it doesn't conflict with the official live555 releases. This is a temporary hack till RTSP seeking is solved properly.

Fix compilation on debian sid. Please check that we're using the appropriate version numbers in the #ifs.

Qt4 - Open. Use a Frame and not a QComboBox for subtitles. (lacks still some toggle function). Catch event to avoid bug of hidding of QFileDialog.