Prevent index corruption when a transaction inserts rows and then aborts close to the end of a concurrent VACUUM on the same table (Tom)

Make CREATE DOMAIN ... DEFAULT NULL work properly (Tom)

Fix excessive logging of SSL error messages (Tom)

Fix crash when log_min_error_statement logging runs out of memory (Tom)

Prevent CLUSTER from failing due to attempting to process temporary tables of other sessions (Alvaro)

Require non-superusers who use /contrib/dblink to use only password authentication, as a security measure (Joe)