pgsql: Establish the rule that array types should have the same typdelim

Log Message:
-----------
Establish the rule that array types should have the same typdelim as their
element types. Since the backend doesn't actually pay attention to the array
type's delimiter, this has no functional effect, but it seems better for the
catalog entries to be consistent. Per gripe from Greg Mullane and subsequent
discussion.

Modified Files:
--------------
pgsql/src/backend/commands:
typecmds.c (r1.123 -> r1.124)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/typecmds.c?r1=1.123&r2=1.124)
pgsql/src/include/catalog:
catversion.h (r1.488 -> r1.489)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/catversion.h?r1=1.488&r2=1.489)
pg_type.h (r1.199 -> r1.200)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_type.h?r1=1.199&r2=1.200)
pgsql/src/test/regress/expected:
type_sanity.out (r1.33 -> r1.34)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/type_sanity.out?r1=1.33&r2=1.34)
pgsql/src/test/regress/sql:
type_sanity.sql (r1.33 -> r1.34)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/type_sanity.sql?r1=1.33&r2=1.34)