(keep backward compatible shortcuts, of course)

* packages.mak: Updated the download server of libopendaap and the used version. 0.4.0 is entirely free on the contrary to previous versions, since it uses a free mdns-library instead of Apple's own now. 
* Makefile: 
    - Our patch was applied upstream, so we don't need it anymore.
    - Fixed a copy&paste typo, which prevented the dist-clean of 9 libraries

  IPV6_ONLY can be turned off. It is supposed to be off by default, and
  it actually is. Unfortunately, OpenBSD and NetBSD people think
  network software programmer like us are too stupid to use this
  feature properly, so they just removed it. Lets say the most stupid
  are not always the ones one think. Also, Windows doesn't support this
  yet. On all these OSes, keep the old behavior; that is prefer IPv4.
  Closes #166.

- Windows protection level compile fix

- add libvlc.a at the end of the linking chain, so that --disable-plugins works for the ActiveX Plugin (ref. #276)

layout and initial value fixes.

  (should fix IPv6 error reporting on Win32)
- Some cleanup

   slide-show.

bookmarks : remove compile warning

   and height while keeping the aspect ratio of the original picture. New
   options to deinterlace the picture on loading.

   (for instance deinterlace filter).

   checks for frequencies and bitrates in MPEG audio.

   order to get the file extension.

   because the new location doesn't exist.

   We cannot do better (i.e. save the position when the window is minimized)
   because we cannot be notified of such event with the wxWindows API.

  (closes #270)
- strlen( static string ) => sizeof
  using strlen with static strings is lame