freedesktop.org.xml.in does not contain a MIME type for audo/x-m4a -- this is an
easy fix. Attaching a patch.
Created attachment 254 [details] [review]
patch for MIME type audio/x-m4a
*** Bug 508 has been marked as a duplicate of this bug. ***
*** Bug 604 has been marked as a duplicate of this bug. ***
Bug #604 has a patch which also matches *.aac files.
I actually committed the patch from bug #604 since it seemed more accurate: the
additionnal magic patterns would have matched mp3 files too I think.