Remove the word "blacklist" from code and documentation

Problem/Motivation

The Drupal community is looking to have more inclusive language across code and documentation. Please refer to: https://www.drupal.org/project/drupal/issues/2993575 →

Steps to reproduce

The project page and code base use the words whitelist/blacklist.
Example pages:
https://git.drupalcode.org/project/node_title_validation
https://www.drupal.org/project/node_title_validation →

Proposed resolution

Replace the words with more inclusive language.

Examples (but seek input from maintainers):

• allowlist
• safelist
• blocklist

Remaining tasks

• Create a plan for which words to use
• Update docs
• Update codebase

User interface changes

MIsc. changes when updated

API changes

TBD

Data model changes

TBD