Fix comment in glob_to_re now that special characters can be escaped.

git-svn-id: http://svn.savannah.nongnu.org/svn/rdiff-backup@787 2b77aa54-bcbc-44c9-a7ec-4f6cf2b41109

trunk/rdiff-backup/rdiff_backup/selection.py

@@ -629,8 +629,8 @@ probably isn't what you meant.""" %
 		"""Returned regular expression equivalent to shell glob pat
 
 		Currently only the ?, *, [], and ** expressions are supported.
-		Ranges like [a-z] are also currently unsupported.  There is no
-		way to quote these special characters.
+		Ranges like [a-z] are also currently unsupported.  These special
+		characters can be quoted by prepending them with a backslash.
 
 		This function taken with minor modifications from efnmatch.py
 		by Donovan Baarda.