Integrate with anonymous_login

Problem/Motivation

Integrate with anonymous_login module automatically.

Proposed resolution

Implement the hook that is to be added here #2816507: Add an API, so modules can integrate seamlessly with this one..

POC code:

 /**
 * Implements hook_anonymous_login_paths_alter().
 *
 * Used to make a no-config integration with the 'anonymous_login' module.
 *
 * @param array $paths
 *   List of exclude/include directives for the anonymous_login module.
 */
function legal_anonymous_login_paths_alter(&$paths) {
  $paths['exclude'][] = 'legal';
  $paths['exclude'][] = 'legal_accept/*';
}

Remaining tasks

Patch in anonymous log-in.
Discussion + patch here.

User interface changes

None.

API changes

New hook implementation. (API addition).

Data model changes

None.