Hi, here are the patches to enhance existing MB handling. This time

I have implemented a framework of encoding translation between the
backend and the frontend. Also I have added a new variable setting
command:

SET CLIENT_ENCODING TO 'encoding';

Other features include:
	Latin1 support more 8 bit cleaness

See doc/README.mb for more details. Note that the pacthes are
against May 30 snapshot.

Tatsuo Ishii

src/backend/regex/regcomp.c

@@ -1344,7 +1344,7 @@ cset	   *cs;
 
 	for (i = 0; i < css; i++)
 		if (CHIN(cs, i))
-			return ((char) i);
+			return (i);
 	assert(never);
 	return (0);					/* arbitrary */
 }