Update to 7.57

Upstream changes:
drupal 7.57
Posted by David_Rothstein on 21 February 2018
Release notes

Maintenance and security release of the Drupal 7 series.

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

Drupal Core - Critical - Multiple Vulnerabilities - SA-CORE-2018-001
No other fixes are included.

(wen)