* Allow cursors to be DECLAREd/OPENed/CLOSEed outside transactions

* Allow PQrequestCancel() to terminate when in waiting-for-lock state

* Transaction log, so re-do log can be on a separate disk by

* Populate backend status area and write program to dump status data

* Make oid use unsigned int more reliably, pg_atoi()

* Allow subqueries in target list