PostgreSQL security updates

The PostgreSQL Global Development Group has released an update to all supported
versions of our database system, including 9.6.3, 9.5.7, 9.4.12, 9.3.17, and
9.2.21. This release fixes three security issues. It also patches a number of
other bugs reported over the last three months. Users who use the PGREQUIRESSL
environment variable to control connections, and users who rely on security
isolation between database users when using foreign servers, should update as
soon as possible. Other users should plan to update at the next convenient
downtime.

URL: https://www.postgresql.org/about/news/1746/
Security: CVE-2017-7484, CVE-2017-7485, CVE-2017-7486

Also modify rcorder and let sshd start before PostgreSQL, so any problems
during startup can be reviewed promplty from an ssh login.