Bug fixes

applied 2996921-coding-standard-5.patch to address coding standards issues in,
https://www.drupal.org/project/cacherefs/issues/2996921

Also added License.txt & .gitignore

• Issue #2765333 by Vinay15: Remove @file tag docblock from all the .php files
• Issue #2932010 by RajabNatshah: Fixed an issue to Not to check Updates or import Fields while the Drupal site MAINTENANCE_MODE is in Install or Update, which generates issues of RuntimeException: Recursive router rebuild detected

#3018999: Improve functional/unit test coverage to help document expected values by mradcliffe, heddn, kaszarobert, michiellucas: Improve functional/unit test coverage to help document expected values

- Properly worked around #1587338: change blank field behavior, the previous version had a potential critical error.

This is the third bug-fix release for Authcache 2. This release comes with a security hardened front controller.

Since 7.x-2.2 the following changes were introduced:

Development version of Pino. NOTE: Can include breaking changes and functionality that is not tested.