Add files from parent branch HEAD:

Add files from parent branch HEAD:
	doc/src/sgml/arch-dev.sgml
	doc/src/sgml/array.sgml
	doc/src/sgml/datatype.sgml
	doc/src/sgml/ddl.sgml
	doc/src/sgml/func.sgml
	doc/src/sgml/indexcost.sgml
	doc/src/sgml/jdbc.sgml
	doc/src/sgml/libpq.sgml
	doc/src/sgml/lobj.sgml
	doc/src/sgml/maintenance.sgml
	doc/src/sgml/monitoring.sgml
	doc/src/sgml/nls.sgml
	doc/src/sgml/page.sgml
	doc/src/sgml/perform.sgml
	doc/src/sgml/plpgsql.sgml
	doc/src/sgml/protocol.sgml
	doc/src/sgml/queries.sgml
	doc/src/sgml/query.sgml
	doc/src/sgml/ref/alter_sequence.sgml
	doc/src/sgml/ref/create_table.sgml
	doc/src/sgml/ref/create_type.sgml
	doc/src/sgml/ref/create_view.sgml
	doc/src/sgml/ref/pg_ctl-ref.sgml
	doc/src/sgml/ref/psql-ref.sgml
	doc/src/sgml/ref/select.sgml
	doc/src/sgml/release.sgml
	doc/src/sgml/rules.sgml
	doc/src/sgml/runtime.sgml
	doc/src/sgml/syntax.sgml
	doc/src/sgml/typeconv.sgml
	doc/src/sgml/xfunc.sgml
	doc/src/sgml/xindex.sgml
	doc/src/sgml/xtypes.sgml