don't accidentally use non-GNU make.

sure exactly what it is it fixes...

psql now returns error from queries and errors files, so ignore return code.

Also, I think that an extra source of noise in the diff of regress.out and
expected.out is caused by not substituting the shared library file
extension in the regression.input file (much like the paths and the
usernames are sub'ed). This seems to be fixed with the following patches
to regression.input and the Makefile... If I'm off base here, please tell!

Submitted by:  Wayde Nie <niew@phoenix.cis.mcmaster.ca>

README file for regresssion tests from Dr. George

Submitted by: Dr. George

Submitted by: Dr. Geoge

submitted by: Dr_George_D_Detlefsen <drgeorge@ilt.com>

Submitted by: Dr. George

submitted by: dr. george

The updating of array fields is broken in Postgres95-1.01, An array can
be only replaced with a new array but not have some elements modified.
This is caused by two bugs in the parser and in the array utilities.
Furthermore it is not possible to update array with a base type of
variable length.


- submitted by: Massimo Dal Zotto <dz@cs.unitn.it>