nagios 8.x-1.10

Possibly breaking change

• Better URL for the ignored modules page: An underscore was added to avoid the spell checker to trigger. This change only affects you if the URL is saved somewhere, e.g. in a bookmark. See commit 2de2ae7.

Bug fixes

• Fixed issue #3137730: the checkboxes to ignore module requirements were not usable while the module's hooks were enabled.
• The ignored modules page only worked correctly directly after a fresh module installation.
• array_diff will work fine with strings, but had to work with Extension objects. This fixes the "Recoverable fatal error: Object of class Drupal\Core\Extension\Extension could not be converted to string" error.

Drupal 9 readiness

• Issue #3114357 by sleitner: Drupal 9 compatibility.

Documentation

• README: declare the formatting style to be Markdown, fix English errors
• Fixed spelling mistakes (or what PhpStorm considers such)

Developer experience

• Added browser-based test in response to issue #3137730.
• Used `composer normalize` to bring JSON into standard format.
• Issue #3123381 by mo_farhaz: Drupal coding standard improvement.