Security update

Maintenance and security release of the Drupal 8 series.

This release fixes security vulnerabilities. Sites are urged to upgrade immediately after reading the notes below and the security announcement:

Fixes potential security problem.
See: Phone Field - Critical - SQL Injection - SA-CONTRIB-2019-001.

Fixes security issue https://www.drupal.org/sa-contrib-2019-003

See the full release notes at: http://docs.aegirproject.org/en/3.x/release-notes/3.17/

Fixes security issue https://www.drupal.org/sa-contrib-2019-002

See the full release notes at: http://docs.aegirproject.org/en/3.x/release-notes/3.17/

JSON:API - Moderately critical - Access bypass - SA-CONTRIB-2018-081

JSON:API - Moderately critical - Access bypass - SA-CONTRIB-2018-081