Add files from parent branch HEAD:

	doc/src/sgml/ref/alter_domain.sgml
	doc/src/sgml/ref/alter_function.sgml
	doc/src/sgml/ref/alter_sequence.sgml
	doc/src/sgml/ref/create_cast.sgml
	doc/src/sgml/ref/create_function.sgml
	doc/src/sgml/ref/create_sequence.sgml
	doc/src/sgml/ref/create_table.sgml
	doc/src/sgml/ref/create_table_as.sgml
	doc/src/sgml/ref/create_trigger.sgml
	doc/src/sgml/ref/create_type.sgml
	doc/src/sgml/ref/create_view.sgml
	doc/src/sgml/ref/createuser.sgml
	doc/src/sgml/ref/delete.sgml
	doc/src/sgml/ref/drop_sequence.sgml
	doc/src/sgml/ref/pg_config-ref.sgml
	doc/src/sgml/ref/pg_dump.sgml
	doc/src/sgml/ref/pg_dumpall.sgml
	doc/src/sgml/ref/pg_restore.sgml
	doc/src/sgml/ref/release_savepoint.sgml
	doc/src/sgml/ref/rollback_to.sgml
	doc/src/sgml/ref/select.sgml
	doc/src/sgml/ref/vacuum.sgml