Fix plpgsql "PERFORM" markup.

Backpatch to 9.0 and 9.1.

Branch
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REL9_1_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/3430ab5986e5d402f7ada7c672a51f679b60c95c

Modified Files
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doc/src/sgml/plpgsql.sgml |    2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

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	Subject: Re: pgsql: Add C comment about why we send cache invalidation messages for
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	Subject: Re: [COMMITTERS] pgsql: Clean up the #include mess a little.