Log Message:
Changes 8.3.1:
* Fix character string comparison for Windows locales that consider
  different character combinations as equal
* Repair corner-case bugs in "VACUUM FULL"
* Fix misbehavior of foreign key checks involving character or bit
  columns
* Avoid needless deadlock failures in no-op foreign-key checks
* Fix possible core dump when re-planning a prepared query
* Fix possible failure when re-planning a query that calls an
  SPI-using function
* Fix failure in row-wise comparisons involving columns of different
  datatypes
* Fix longstanding "LISTEN"/"NOTIFY" race condition
* Disallow "LISTEN" and "UNLISTEN" within a prepared transaction
* Disallow dropping a temporary table within a prepared transaction
* Fix rare crash when an error occurs during a query using a hash
  index
* Fix incorrect comparison of tsquery values
* Fix incorrect behavior of LIKE with non-ASCII characters in
  single-byte encodings
* Disable xmlvalidate