Description
PHP is switching from Apache to "MIME-db" because the Apache MIME type list is incomplete and it doesn't update frequently. See php/php-src#5764

The differences are not huge, but for example, .ini, .json5, .jsx, .less, .m4p (<- not a typo) and other extensions are missing in our list but exist in MIME-db; others have different default types (e.g. .gz, .xlf, etc.)