Release 2019_013 (2019-05-08)

NixOS 15.09 platform

• Fix relay host update timer, the timer’s controlled unit was missing a type suffix. (#29649)

• Customer-specific routing changes (#110301)

NixOS 18.09 platform

• Enable cron service by default (#110441)

• Port mailout and mailserver roles

• Port MongoDB roles (versions 3.2, 3.4)

• Port PostgreSQL roles (versions 9.5, 9.6, 10)