Change pg_upgrade to use port 50432 by default to avoid unintended
client connections during the upgrade.  Also rename data/bin/port
environment variables to being with 'PG'.  Also no longer honor PGPORT.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/a88f4496b75a756df371a405ce608ceb06c8fbd7

Modified Files
--------------
contrib/pg_upgrade/check.c      |    3 +++
contrib/pg_upgrade/option.c     |   28 ++++++++++++++--------------
contrib/pg_upgrade/pg_upgrade.h |    3 +++
doc/src/sgml/pgupgrade.sgml     |   26 +++++++++++++++-----------
4 files changed, 35 insertions(+), 25 deletions(-)

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Next:	From: Bruce Momjian	Date: 2011-07-01 22:36:32
	Subject: pgsql: In the pg_upgrade docs,move 50432 port mention to the place whe
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	Subject: Re: [COMMITTERS] pgsql: Make the visibility map crash-safe.