This is a fallback option in case we cannot find a match. We don't set a default actual font, since we do not ship one with VLC. We can set one per platform, but I don't think it is worth the trouble.

libass: ass_set_fonts_dir() is for a "private" storage place for fonts in case any of them need to be extracted.

Since we support fontconfig fontlookup on windows/mac/*nix there should be no real need to actually use this directory, but we still need to set one.

Originally in wrong order because of a blend bug that presented itself on fenrir's setup.

Recognized are
For macosx:
/System/Library/Fonts
/Library/Fonts
~/Library/Fonts

For windows:
C:\\windows\fonts
C:\\winnt\fonts

fontconfig: tell fontconfig about the fonts configdir on OSX ( /usr/X11/lib/X11/fonts ). There is no /etc/fonts

libass: move attachments processing before the ass_set_fonts_dir() option which enables those fonts.
Set a fonts_dir for OSX. We might wanna fix that later on.

Conflicts:

	extras/contrib/src/Makefile

Save 2 x 85ko

Don't launch an update request at the first launch, but wait for the second launch in order to have the right network-policy value. This fixes the 'I update even when you said no" bug.

live555: fix "unpause" and remove startseq, which is no longer needed because we don't do NPT calculations ourselves.