pause/play and change of audio channel.

    the latest aout3 changes.

* Fixed a few boolean_t.

* Major changes in the handling of dates in the audio output ; still buggy,
but differently.
* Fixed a major bug in the aout pre-filters, preventing to run any other
decoder than liba52.
* p_aout->output.pf_play now has only one argument.

    it depends on the audio format. Cosmetic changes. The S/PDIF output may
    work.

Getting there :)

    mingw32 doesn't know about sighandler_t.

    signal handler to its previous value after use.
  * ./src/libvlc.c: moved signal handling to vlc.c.

  * ./configure.in: added check for libxosd version.

* modules/video_output/x11/xcommon.c: fixed a bug related to the size of the
fullscreen window. We also unmap the current window when switching to fullscreen.

is available

    really needed, and we were calling pthread_mutex_lock from it.
  * ./src/libvlc.c: released a vlc_list_t that caused vlc --list to hang.

file in DATA_PATH
 modules/gui/kde/kde.cpp and interface.h: removed a stupid class, moved
stuff from open() to run() to make the kde interface start without
segfaults.

Now everything should compile with every gcc with no problem (mp4, ffmpeg
and faad plugins, especially).

    (compilation fix for Solaris).

    functions.
  * ./modules/demux/mpeg/audio.c: at least three PS startcodes are required
    before we abort the parsing and consider the input as PS instead of MP3.

    configure.

  * ./modules/gui/win32/preferences.cpp: the Win32 interface doesn't use the
    old module linked list anymore.

    the vlc_object_* and vlc_list_* functions to manage modules. The Win32
    interface doesn't build, but I'll fix this.

TODO: S/PDIF mode.

- added GtkCList instead of GtkList.
- added first column sorting order by clicking on column header
- selecting item from list works
- reading entire directory list is displayed in GtkCList widget

    vlc_object_find() but returns a list of _all_ the matching objects. Only
    works with FIND_ANYWHERE at the moment.
  * ./modules/gui/gtk/preferences.c, ./modules/gui/kde/preferences.cpp,
    ./modules/gui/win32/preferences.cpp: the module lists in the preferences
    menus work again.
  * ./src/misc/objects.c: added a missing sizeof that caused crashes because
    the reindexing of the global object array was incomplete.
  * ./include/modules_inner.h: propagated the module long description to its
    submodules.

  * ./src/audio_output/audio_output.c, ./src/audio_output/mixer.c: fixed a
    horrible sound issue by making sure internal buffers have a size multiple
    of 4 bytes. Waiting for a real fix made in Meuuh, of course.

 * compilation fix (by sam)

    This first draft is made to read RTP streamed by the vls.

    just as 'd' displayed a tree of attached objects.
  * ./src/misc/modules.c: added a missing header.

  received does not start exactly at the given date, it indicates if the
  output plug-in is able to compensate for the drift (for instance on
  startup, or with S/PDIF packets), or if we need the aout core to
  resample the coming buffers. It is currently unimplemented.

  p_buffer now has a i_nb_bytes member. It is possible to indicate for a
  format its byterate (necessary for AC3 and SPDIF).
* S/PDIF output seems to be working at last (tested with the file output).