psql \lo_* quiet mode patch

I sent this in rather late in the 8.2 cycle, so now that 8.3 development
is underway I thought I'd try sending it again. This patch was necessary
in the development of a large object regression test, but is logically
seperate and reasonable even without that test, so I'm sending it in
seperately for independant consideration. I'll save my pushing on the
large object test until this one gets in ;)

---------- Forwarded message ----------
Date: Thu, 26 Oct 2006 15:58:07 -0700 (PDT)
From: Jeremy Drake <pgsql(at)jdrake(dot)com>
To: PostgreSQL Patches <pgsql-patches(at)postgresql(dot)org>
Subject: [PATCHES] psql \lo_* quiet mode patch

I sent this in a while back, but never heard anything about it.

This patch makes psql's \lo_* commands respect the -q flag (or other
methods of setting quiet mode) as well as HTML output mode. This came in
very handy when writing a regression test which uses the \lo_import
command since it would otherwise output the OID of the new large object
which would be different every run.

Please let me know if it is ok, or if I need to do it differently.

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