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Missing some cases that I could not test.
Also ffmpeg/chroma.c is locked, so I can but leave it broken.
Fix is for the remaining modules is obvious and the issue is easy to detect.

This also seems to make the pre-existing Qt4 crash more obvious.

* Headers in include must contain the structures and prototypes needed
  by the plugins and should be named vlc_*.
* Headers in include/vlc must contain the structures and prototypes
  needed by external libvlc clients

* Moved and renamed some things in headers. 
   - Removed vlc_cpu.h, vlc_error.h (merged in vlc_common)
   - Removed snapshot.h (merged in vlc_vout.h)
   - Removed vlc_spu.h (merged in vlc_osd.h)
   - Removed intf_eject.h and vlc_interaction.h (merged in vlc_interface)
   - Moved all internal headers to src
   - Merged vlc_video.h and video_output.h and move private things to src
   - Removed vlc/intf.h, vlc/aout.h, vlc/vout.h, vlc/decoder.h and vlc/input.h
     (meta headers for use in modules, and often implying too large 
     dependencies)
* Removed some useless dependencies
* Unexported a bunch of functions and structures used only in src/
  (--> Still some work here)
* Finally made input_thread_t and input_source_t (mostly) private. 
  Added input_GetItem to fetch the input_item of an input_thread
* Cleaned up deprecated entries in vlc_symbols.h and bumped up symbol 
  prefix

This commit has a 99% probability of breaking the build, 0.1% of killing
your cat and 0% of getting you hot chicks.

Also, make it clearer what is shared and instance-specific

So,
libvlc_t ==> libvlc_global_t
vlc_t ==> libvlc_int_t (internal instance)

p_object->p_libvlc ==> p_object->p_libvlc_globale
p_object->p_vlc ==> p_object->p_libvlc

VLC_OBJECT_VLC ==> VLC_OBJECT_LIBVLC

And by the way, there is some cleanup required :) (ie, some things are created in the global object instead of the instance-specific one)

* modules/audio_output/directx.c: partial rewrite not to use position notification anymore (since even microsoft says it's buggy). That should solve all known issues with the directx audio output.

* modules/audio_output/directx.c: fixed the way we get the current latency in the driver. fixes the continuous resampling issues with s16l and might also fix the fl32 problems. This needs some heavy testing.

(da big courmischage)

* modules/audio_output/directx.c: audio device selection based on a patch from Matthew Armsby (uberground at gmail dot com) + config option to disable float32 output.

* Each module can declare a "human-readable short name" with set_name
* Modules are sorted by category (set_category, set_subcategory).
  Modules configs can be separated by set_section()
* Separated audio-filter and audio-visual
* Separated extraintf and control
* New command and widget : add_module_list() for comma-separated modules
* Vfilters now use "," as separator

   A few users have been reporting problems with the directx audio output and it might very well be the cause of their problems (ie. with buggy drivers).

sorry :)

(but as I'm too tired and it's apero time, round three
will follow later on in the night)

* modules/audio_output/directx.c: don't set the default audio output to mono even if the windows settings are set to mono.
  Too many people just don't know how to set the windows speakers configuration setting properly.

* modules/control/ntservice.c: added a --ntservice-extraintf option to allow the service to spawn additionnal interfaces.
* include/audio_output.h, modules/audio_output/directx.c: added support for 3F2R audio output in addition to 3F2R/LFE (5.1).

* modules/audio_output/directx.c: 5.1 audio output now works on sblive/audigy as well :)
* modules/audio_output/waveout.c: fixed the waveOut plugin so works on NT4 as well... that complicates the plugin a bit more than I would have wanted, but hey.
* modules/gui/wxwindows/messages.cpp: the verbose checkbox is set to the value of the --verbose config option.

* modules/audio_output/directx.c: fixed mem leak in 5.1 audio.

*  modules/audio_output/directx.c, modules/audio_output/waveout.c: we destroy the audio-device variable if the probing has failed.

* src/misc/variables.c, ALL: improvements to the object variables api.
   - added another argument to var_Change().
   - added a VLC_VAR_SETTEXT and VLC_VAR_GETTEXT method to var_Change()
     that are used to set/get a friendly name to an object variable.
   - added VLC_VAR_CHOICESCOUNT to var_Change() to be able to retrieve
     the number of availabel choices without having to get their value
     as well.
   - VLC_VAR_ADDCHOICE uses the extra var_Change() argument to assign
     a friendly name to the choice value.
   - VLC_VAR_GETCHOICES retrieves the choices values and their friendly
     names.

* modules/gui/wxwindows/*: first step in implementing menu auto-generation in the wxWindows interface.

* modules/audio_output/directx.c: fixed the "no sound on NT4" problem. The directx audio plugin wasn't freeing its resources properly in case Probe() failed so the waveout plugin couldn't open the audio device afterwards.
* modules/video_output/directx/directx.c: work-around buggy video drivers that create unsupported surfaces without shouting. Hopefully, non overlay YUV surfaces shouldn't be created anymore if not supported.

* modules/audio_output/directx.c, modules/audio_output/waveout.c:
   cosmetic changes.

* modules/*: sanitization of the modules description strings.

* ALL: Finally fixed the MSVC project files.
       Don't include io.h on win32 when not necessary.
       A few build fixes for MSVC.

* src/misc/win32_specific.c: try to load winsock2 instead of winsock1 when
   present.

* src/libvlc.h, modules/audio_output: added a global --spdif config option
   to allow using the spdif output by default if available.
* modules/misc/dummy/*: on win32 added a quiet mode that doesn't display
   a dos command box.
* modules/control/rc/rc.c: on win32 enabled the echo mode and the
   backspace key.
* modules/codec/mpeg_audio.c: fixed a sync bug.

* modules/audio_output/directx.c: forgot to enable channel re-ordering.
* modules/audio_output/waveout.c: fixed a crash that happened when probing
   devices supporting S/PDIF. (Should fix 354)

* modules/audio_output/directx.c: added multichannel support to the
   directx plugin.
* modules/audio_output/waveout.c: fixed quad audio channels detection and
   a few misplaced debug messages.
* configure.ac.in: don't link anymore the rc plugin with the winsock lib.

   seems to be more reliable