needs review, not tested but it compiles

- cleanup net_AddressIsMulticast

  (btw, fixes SAP to link-local multicast IPv6)
- Fix scoped IPv6 address in SDP
- Cleanup multicast address determination and others

- accept 224.0.0.0 as a multicast address

   repeat_first_field handling.

   output correct timestamps.

   sometimes blocks on read() after returning from select().

   mode.

   Use --enable-dvb instead.

segfault

* modules/demux/mp4/libmp4.c: handle SoundDescriptionV2 which is used in some of the new Apple movie trailers.

cleaner way to do it (like having only one version number instead of 3
in configure.ac ...)

* Change volume range to 0-400 % visually in the macosx and web interfaces. At least now we represent what is actually going on. refs #250

- Use already existing commodity functions for URL encoding

(or yet another "why make it complex when it can be simple")

 - Add a basename field to the file entry when doing a foreach on directory.
 - Add a url_encode function to url-encode the current string. This
   is necessary to safely pass strings as arguments in a URL.
Patch courtesy of Clement Vasseur for Freebox SA.