Add support for ALTER RULE ... RENAME TO.

Tom Lane <tgl@sss.pgh.pa.us>

Commit: c61e26ee3e447c0277c6c4e5a8a452dbefdc502d
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2013-02-09T04:58:40Z
Releases: 9.3.0
Add support for ALTER RULE ... RENAME TO.

Ali Dar, reviewed by Dean Rasheed.

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