Add support for renaming constraints

Peter Eisentraut <peter_e@gmx.net>

Commit: 39d74e346c083aa371ba64c4edb1332c40b56530
Author: Peter Eisentraut <peter_e@gmx.net>
Date: 2012-03-10T18:19:13Z
Releases: 9.2.0
Add support for renaming constraints

reviewed by Josh Berkus and Dimitri Fontaine

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