Fix misleading references to columns in GRANT/REVOKE summaries

Folks,

Per a question Alexey Parshin asked in the IRC channel, I'm attaching
a patch to the GRANT and REVOKE syntax summaries which replaces the
misleading word "column" with "parameter."  "Column" is misleading
because it could be read to imply a column-level GRANT/REVOKE, which
we don't have yet.

Cheers,
D
--
David Fetter <david@fetter.org> http://fetter.org/
phone: +1 415 235 3778        AIM: dfetter666
                              Skype: davidfetter

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