New upstream microreleases 9.3.21, 9.5.11 and 9.6.7

Uploads prepared and building in ppas atm;
For tests pre-upload (while waiting for the official release)

Trusty: https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/3128
Xenial: https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/3129
Artful: https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/3130

Bug 1748161 is about the improvement of the britney hints to not have the SRU Team force it all the time.

All autopkgtests good on the ppa except those that will be addressed in bug 1748161 anyway.

Also the official release notes are up.
With that I completed the changelog entries and I'm ready to upload.

Last time this contained CVEs it went through security - I'll check how we handle this time.

Opening up bug as news are public now.

These fix CVE-2018-1053.

This contains a CVE, so the security Team will push it through -security.
Good that we had all pre-tests already.

P.S. autopkgtests can be seen on bileto https://bileto.ubuntu.com/#/ticket/3128 - 3130

This bug was fixed in the package postgresql-9.3 - 9.3.21-0ubuntu0.14.04

---------------
postgresql-9.3 (9.3.21-0ubuntu0.14.04) trusty-security; urgency=medium

  * New upstream release (LP: #1747676)
    - Ensure that all temporary files made by pg_upgrade are non-world-readable
      (CVE-2018-1053)
    - Details about other changes at full changelog:
      https://www.postgresql.org/docs/9.3/static/release-9-3-21.html

 -- Christian Ehrhardt <email address hidden> Tue, 06 Feb 2018 15:19:51 +0100

This bug was fixed in the package postgresql-9.5 - 9.5.11-0ubuntu0.16.04

---------------
postgresql-9.5 (9.5.11-0ubuntu0.16.04) xenial-security; urgency=medium

  * New upstream release (LP: #1747676)
    - Ensure that all temporary files made by pg_upgrade are non-world-readable
      (CVE-2018-1053)
    - Details about other changes at full changelog:
      https://www.postgresql.org/docs/9.5/static/release-9-5-11.html

 -- Christian Ehrhardt <email address hidden> Tue, 06 Feb 2018 15:20:02 +0100

This bug was fixed in the package postgresql-9.6 - 9.6.7-0ubuntu0.17.10

---------------
postgresql-9.6 (9.6.7-0ubuntu0.17.10) artful-security; urgency=medium

  * New upstream release (LP: #1747676)
    - Ensure that all temporary files made by pg_upgrade are non-world-readable
      (CVE-2018-1053)
    - Change the behavior of contrib/cube's cube ~> int operator to make it
      compatible with KNN search.
      The meaning of the second argument (the dimension selector) has been
      changed to make it predictable which value is selected even when
      dealing with cubes of varying dimensionalities.
      This is an incompatible change, but since the point of the operator
      was to be used in KNN searches, it seems rather useless as-is.
      After installing this update, any expression indexes or materialized
      views using this operator will need to be reindexed/refreshed.
    - Details about other changes at full changelog:
      https://www.postgresql.org/docs/9.6/static/release-9-6-7.html

 -- Christian Ehrhardt <email address hidden> Tue, 06 Feb 2018 15:20:19 +0100