Upgrade PostgreSQL

The PostgreSQL Global Development Group has released an update to all
supported versions of our database system, including 12.1, 11.6, 10.11,
9.6.16, 9.5.20, and 9.4.25. This release fixes over 50 bugs reported
over the last three months.

PostgreSQL 9.4 will stop receiving fixes on February 13, 2020, which is
the next planned cumulative update release. We suggest that you make
plans to upgrade to a newer, supported version of PostgreSQL. Please see
our versioning policy for more information:

This update also fixes over 50 bugs that were reported in the last
several months. Some of these issues affect only version 12, but may
also affect all supported versions.

Specific change to the FreeBSD port:
Starting now, the default for TZDATA has changed to using the underlying OS'
time zone database instead of the one built in to PostgreSQL. This change is
made since PostgreSQL will not release a patch in the event where the time zone
database changes, whereas FreeBSD will.

Release notes: https://www.postgresql.org/about/news/1994/
URL: https://www.postgresql.org/support/versioning/