Change: Modernize Marriage Type for several languages
Fix: Various errors and warnings caused by PHP 8 not treating NULL as an empty string or array
Change: Add DuckDuck to list of known crawlers
Fix: "Create thumbnail" option missing in list of actions for Media items
Fix: Incorrectly formatted "Contact Admin" link causes "Not welcome here" errors
Change: Add facebook to list of known crawlers
Fix: Names beginning with a question-mark can cause "Not welcome here" errors
Fix: PHP 8, several "implicit float to integer conversion loss of precision" warnings
Fix: Minor improvement when importing Dutch dates