support new db versions

http://bugs.gentoo.org/192753

--- cyrus-sasl-2.1.22/cmulocal/berkdb.m4
+++ cyrus-sasl-2.1.22/cmulocal/berkdb.m4
@@ -213,7 +213,7 @@
 	fi
 
 	saved_LIBS=$LIBS
-        for dbname in db-4.4 db4.4 db44 db-4.3 db4.3 db43 db-4.2 db4.2 db42 db-4.1 db4.1 db41 db-4.0 db4.0 db-4 db40 db4 db-3.3 db3.3 db33 db-3.2 db3.2 db32 db-3.1 db3.1 db31 db-3 db30 db3 db
+        for dbname in db-4.8 db-4.7 db-4.6 db-4.5 db-4.4 db4.4 db44 db-4.3 db4.3 db43 db-4.2 db4.2 db42 db-4.1 db4.1 db41 db-4.0 db4.0 db-4 db40 db4 db-3.3 db3.3 db33 db-3.2 db3.2 db32 db-3.1 db3.1 db31 db-3 db30 db3 db
           do
 	    LIBS="$saved_LIBS -l$dbname"
 	    AC_TRY_LINK([#include <db.h>],