Security and maintenance release for PostgreSQL: versions 9.1.3, 9.0.7, 8.4.11 and 8.3.18

Today, PostgreSQL Global Development Group released new versions of all active branches. This includes three security bugfixes, two of which are pretty obscure and one that fixes a possible security issue with restoring un-sanitized output from pg_dump. Details about the security issues are included in the release announcement.
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