Added switch for displaying comments next to filename

examples/unadf.usage

@@ -3,6 +3,7 @@ unadf [-lrcsp -v n] dumpname.adf [files-with-path] [-d extractdir]
     -r : lists directory tree contents
     -c : use dircache data (must be used with -l)
     -s : display entries logical block pointer (must be used with -l)
+    -m : display file comments, if exists (must be used with -l)
 
     -v n : mount volume #n instead of default #0 volume