*dvd and dvdread support for input III.

Dvdread is known to segfault at title change. I'm working on this.

- Major rewrite of the buffer core functions
- Modularity of access plugins (file, udp, http)
- Modularity of network stack (ipv4, soon ipv6)
- Autodetection of the type of stream

And a new killing feature : HTTP streams are now seekable.

Please note that dvd, dvdread and vcd plug-ins are broken and thus disabled.

  * ./plugins/mpeg_vdec/vpar_headers.c: we no longer crash when the next
    stream doesn't have the same image size as the previous one.
  * ./src/audio_output/aout_pcm.c: another overrun fix; please test.

  * ./configure.in: fixed a plugins/dsp.so compilation issue under OpenBSD.

  * ./plugins/dsp/aout_dsp.c: OpenBSD compilation fix.
  * ./src/video_output/video_output.c: fixed a segfault on exit.

  * ./src/input/input.c: BeOS network support (no idea if it works when you
    don't have BONE, though).

  * ./include/common.h: BeOS compile fixes.
  * ./plugins/beos/vout_beos.cpp: fixed BeOS video output.

* Fixed uninitialized variable in config_Duplicate()
* Fixed problem introduced in latest gtk commit

* forgot to add the declaration of server_port in main.c
* char pointers obtained by config_GetPszVariable need to be freed

Multicast now works under Win32, but this is a _bad_ kludge.

It still segfaults 4 secondes after the first frame, but, at least, I
can see two or three frames from MI2 :-)

I'd better used dvd_title or so but INPUT_TITLE_VAR is also used in
gtk_open.c and I can't find a neat way to prevent this, so I leave this
option in main.c.

  * ./include/threads.h: support for the State Threads Library, a userland
    threads library (http://state-threads.sourceforge.net/). Useless to most
    people, but can be handy to debug stuff. Activate with `--enable-st'.

*Adaptation to new configuration scheme for dvd, dvdread and spdif

  * ./plugins/lirc/lirc.c: removed CVS garbage.

  * ./plugins/gtk/gtk_menu.c: fixed a compile issue on IA64.
  * ./plugins/fx/scope.c: new toy plugin, an audio scope module.

    Each time I fix a bug in vlc I feel urge to code something useless. This
    one is very, very rough for the moment, probably buggy, slow, will crash
    your blender and reboot your fridge. Screenshot can be found here:
      http://www.zoy.org/~sam/vlc/vlc-scope.jpeg
    Activate with `--aout scope' (yes, it currently disables the real
    audio output... I'll fix this as well).

  * Replacement header for aout_common.h.

  * Forgot one fix in my previous commit. As usual.

  * Fixed a quite old bug in the audio output which made the sound stutter
    when wrapping around the audio output fifo.
  * Lots of simplifications in the audio output, got rid of b_stereo.

in multi-program streams (such as ones provided by a DVB-S card).

This is the first part of the new configuration architecture for vlc.
Two other parts will follow soon:
- config file implementation
- gtk configuration interface.

This part won't change much for end-users as these changes are mostly
internal, you will however notice that the command line interface has
changed. It will maybe be less user-friendly as I almost removed the
short options but it shouldn't a big problem when the config file is
implemented.

What as changed is that it is really easy now to add configuration
options to vlc. Plugins can also implement configuration options. All
you have to do is to declare a MODULE_CONFIG section in your plugin.
If you want to know more about this look at configuration.h and for some
example: main.c, dsp.c or xvideo.c

It would be nice if every developper could now start using configuration
options in there plugins and also enhance old plugins.

That's it, now let's hope I didn't break too many things ;-)

* fixed array over-run bug in intf_MsgUnsub

* Don't try to grok altivec with mingw32.
* --with-directx-path should now indicate the path where the actual
headers are (before the headers had to be in an include subdir). By the
way you can download these header files from the videolan web site.

  * ./src/misc/modules_plugin.h: if symbol foo isn't found in the
    plugin, we always try to open _foo, whatever the architecture.

  * ./plugins/lirc/lirc.c: non-blocking patch from Sigmund Augdal
    <sigmunau@stud.ntnu.no>; hope this time my enhancements don't break
    everything :-)

  * ./configure.in: gtk*-config detection fix for FreeBSD.

  * ./configure.in: removed a bashism.
  * ./plugins/x11/xcommon.c: support for systems without shm.h.
  * QNX compilation fixes here and there; the qnx plugin still doesn't work.

  * ./Makefile: the win32 port now uses a more recent version of gtk+.

  * ./plugins/gtk/gtk.c: the log window is now black with colourful text.
  * ./plugins/gtk/gnome.c: ported the log window to the GNOME interface.
  * ./src/interface/intf_msg.c: messages are sent to the queue even if
    -vvvv* wasn't specified.

  * ./plugins/lirc/lirc.c: fixed my mistakes from yesterday.

  * ./plugins/lirc/lirc.: various fixes, thanks to Sigmund Augdal.
  * ./plugins/text/logger.c: rewrote an ugly loop.
  * ./plugins/gtk/gtk.c: added a Gtk+ window containing all the log
    messages; updated in real time. To open it, go to "view"->"messages".

   * Got rid of TRACE and intf_DbgMsg which were seldom used anyway.
   * All intf_*Msg functions now write to stderr.
   * Implemented a message queue interface plugins can subscribe to.
   * Wrote the logger interface plugin. Usage:
      vlc -I logger:filename.log
   * Lots of fixes in the SPU renderer.

  * MacOS X intf now returns, allowing vlc to terminate properly
  * Added a new make target: package-macosx

* Win32 compilation fixes (mingw includes dirent)
* configure now checks for ddraw.h and not directx.h
* vout_directx doesn't include directx.h anymore (this file isn't part of
    the directx sdk)
* moved all the stuff from aout_waveout.c directly into waveout.c (I don't
    know what I was thinking about when I created these two files ;-)
* until we fix the audio buffer underrun problem, waveout will be the
    default audio output on win32 (instead of directx).

  * ALL: got rid of *_Probe functions because most of them were duplicates
    of the real _Init or _Create functions. That's 1000 lines of code gained.
  * ./src/misc/modules.c: we try not to keep the global lock in module_Need,
    which should speed up output spawning.
  * ./plugins/dummy/input_dummy.c: fixed vlc:quit command.
  * ./plugins/gtk/gtk_playlist.c: compilation fix.
  * ./plugins/macosx/*: preliminary fixes for the vout4 port.

   Notes on the *_Probe eradication:
  o I probably broke the DirectX video output, because of the "must init and
    run in the same thread" issue. I'll fix this ASAP.
  o Subtitles are broken (or at least, pretty ugly) in RGB mode.
  o The input plugins still have *_Probe functions. This will disappear when
    meuuh is finished with the access plugins.
  o The decoder plugins still have *_Probe functions. This is probably not
    going to change, it looks OK to me.

  * Grmbl. Forgot to commit those Win32 fixes last time, and they were
    stuck on VTHR. Sorry xav, this probably explains why I couldn't
    find the commit log :-)

  * ./plugins/beos/*: BeOS fixes from Rudolf Cornelissen.
  * ./src/interface/main.c: --desync now really accepts a value in ms.
  * ./plugins/vcd/input_vcd.c: fixed a crash when not opening a VCD.
  * ./src/video_output/vout_subpictures.c: fixed subtitles under BeOS and
    other architectures which don't support overlay.

* compilation fix (include stdint.h)
* fixed a SEGV