Make PQsetdbLogin() have the same defaults as PQconnectdb() (Tom)
Allow libpq to cleanly fail when result sets are too large (Tom)
Improve performance of PGunescapeBytea() (Ben Lamb)
-Allow threaded with --enable-thread-safety (Lee Kindness, Bruce)
+Allow threaded with --enable-thread-safety (Lee Kindness, Philip Yarra)
Allow pqInternalNotice() to accept a format string and args instead of
just a preformatted message (Tom, Sean Chittenden)
Allow control SSL negotiation with sslmode values "disable", "allow",