Implement types regprocedure, regoper, regoperator, regclass, regtype
Tom Lane <tgl@sss.pgh.pa.us>
Implement types regprocedure, regoper, regoperator, regclass, regtype per pghackers discussion. Add some more typsanity tests, and clean up some problems exposed thereby (broken or missing array types for some built-in types). Also, clean up loose ends from unknownin/out patch.