Remove @anchor{} commands from the POD output.

This allows to use the @xref{} command for the HTML output.

Originally committed as revision 25854 to svn://svn.ffmpeg.org/ffmpeg/trunk

doc/texi2pod.pl

@@ -346,6 +346,7 @@ sub postprocess
     # @* is also impossible in .pod; we discard it and any newline that
     # follows it.  Similarly, our macro @gol must be discarded.
 
+    s/\@anchor{(?:[^\}]*)\}//g;
     s/\(?\@xref\{(?:[^\}]*)\}(?:[^.<]|(?:<[^<>]*>))*\.\)?//g;
     s/\s+\(\@pxref\{(?:[^\}]*)\}\)//g;
     s/;\s+\@pxref\{(?:[^\}]*)\}//g;