Improve plpython fix comment in pg_upgrade.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/a7f2c79a6eebccd94aade2b03d40a2caeba8a5c3

Modified Files
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contrib/pg_upgrade/function.c |    4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)

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Next:	From: Fujii Masao	Date: 2012-01-25 06:23:40
	Subject: Re: [COMMITTERS] pgsql: Add new replication mode synchronous_commit = 'write'.
Previous:	From: Bruce Momjian	Date: 2012-01-25 03:42:48
	Subject: pgsql: In pg_upgrade, when checking for the plpython library,we must c