pg_password utility.  Cleanup for psql passwords.  New datetime contrib stuff for new version.  Fix for strutils needing config.h.

elog(WARN,"ADD ATTRIBUTE: DEFAULT is not implemented, yet");
Call ExecConstraints in CopyFrom

Store CHECK infos on CREATE TABLE

Set atttype for relchecks to 21 (int2)
Set relkind for pg_attrdef & pg_relcheck to 'n'

+ FreeTupleDesc

Use  for 'selct .. into ..' copy of TupleDesc (without constraints)
#ifdef NOT_USED for resetVarAttrLenForCreateTable (just free tupdesc copy)

+ CreateTupleDescCopyConstr to copy them too.
+ FreeTupleDesc

Change time function names to be more consistent, and check for zero divides, from Michael Reifenberg.