Update PostgreSQL 9.5 to latest version

Security Fixes for RLS, BRIN
----------------------------

This release closes security hole CVE-2016-2193
(https://access.redhat.com/security/cve/CVE-2016-2193), where a query plan
might get reused for more than one ROLE in the same session.  This could cause
the wrong set of Row Level Security (RLS) policies to be used for the query.

The update also fixes CVE-2016-3065
(https://access.redhat.com/security/cve/CVE-2016-3065), a server crash bug
triggered by using `pageinspect` with BRIN index pages.  Since an attacker
might be able to expose a few bytes of server memory, this crash is being
treated as a security issue.

Abbreviated Keys and Corrupt Indexes
------------------------------------

In this release, the PostgreSQL Project has been forced to disable 9.5's
Abbreviated Keys performance feature for many indexes due to reports of index
corruption.  This may affect any B-tree indexes on TEXT, VARCHAR, and CHAR
columns which are not in "C" locale. Indexes in other locales will lose the
performance benefits of the feature, and should be REINDEXed in case of
existing index corruption. The feature may be re-enabled in future versions if
the project finds a solution for the problem.  See the release notes, and the
wiki page on this issue for more information:
http://wiki.postgresql.org/abbreviatedkeys_issue

URL:		http://www.postgresql.org/about/news/1656/
URL:		http://wiki.postgresql.org/abbreviatedkeys_issue
Security:	CVE-2016-2193
Security:	CVE-2016-3065

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