manual: Fix dead audiocoding.com link.

As pointed out by Sven, audiocoding.com has been out of service and
shut down the website since August of 2020. The library is still
available for download on the sourceforge project page, so link to
that page instead.

Reported-by: Sven <sven.videoproc@gmail.com>

diff --git a/web/manual.md b/web/manual.md
index 44799e910fc8c041667599fcff8669a1a89608c1..c7a60cae4ca31994be7f2ed71f02fa2f7a6f5cba 100644 (file)
--- a/web/manual.md
+++ b/web/manual.md
@@ -358,7 +358,7 @@ recognized. The mp3 tagger also needs this library for modifying
 you need libogg, libvorbis, libvorbisfile. The corresponding Debian
 packages are called `libogg-dev` and `libvorbis-dev`.
 
-- [libfaad and mp4ff](http://www.audiocoding.com/). For aac files
+- [libfaad and mp4ff](https://sourceforge.net/projects/faac/). For aac files
 (m4a) you need libfaad and libmp4ff (package: `libfaad-dev`). Note
 that for some distributions, e.g. Ubuntu, mp4ff is not part of the
 libfaad package. Install the faad library from sources (available