Clarify the intended meaning of wont_fix.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@12396 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

doc/issue_tracker.txt

@@ -146,8 +146,12 @@ bug/closed/fixed
     Bugs which have to the best of our knowledge been fixed.
 
 bug/closed/wont_fix
-    Bugs which we will not fix, the reasons here could be legal, philosophical
-    or others.
+    Bugs which we will not fix, the reasons here could be legal, high
+    complexity / speedloss for supporting some obscure corner casses, ...
+    That is wont_fix means we would also reject a patch.
+    If we are just to lazy to fix a bug then the correct state is open
+    and unassigned. Closed means that the case is closed which is not
+    the case if we are just waiting for a patch.
 
 bug/closed/works_for_me
     Bugs for which sufficient information was provided to reproduce but