Ooops, missed that a couple of contrib modules have calls to byteacmp.

Add bytea.h inclusions as needed.  Some of the contrib regression tests
need to be de-hexified, too.  Per buildfarm.

contrib/pgcrypto/sql/init.sql

@@ -12,6 +12,9 @@ SET client_min_messages = warning;
 \set ECHO all
 RESET client_min_messages;
 
+-- ensure consistent test output regardless of the default bytea format
+SET bytea_output TO escape;
+
 -- check for encoding fn's
 SELECT encode('foo', 'hex');
 SELECT decode('666f6f', 'hex');