REL_14_21
CREATE INDEX: use the original userid for more ACL checks.
Support "make check" in contrib
Fix incorrect declaration of citext's regexp_matches() functions.
Make contrib modules' installation scripts more secure.
Support the new regexp_match() function for citext.
Add citext_pattern_ops for citext contrib module
Add a 64-bit hash function for type citext.
Move src/backend/utils/hash/hashfn.c to src/common
Mark some contrib modules as "trusted".