* Update the GeoIp database download method [BREAKING]
Now GeoIp database updates require a ClientID and a LicenseKey, which can be obtained for free at https://www.maxmind.com/en/accounts/current/license-key
* Codestyle
* #1874 Introduce individual ConsoleLogger instance per class
- Create ConsoleLoggerFactory from which a separate logger can be created for each class
- Allows to support individual log level settings in the future
* Fix CodeStyle issue
* Replace full class name with import
* Update usages after merge from master
* Migrate to GEO IP 2, because support will drop in April
* Change all links of maxmind to https
* Update maxmind database dependency and add javatar to extract
the database from the tar archive
(now only a small difference in jar file size -> ~80KB smaller)
* Verify downloaded archive using MD5 (There are no other checksums available)
* Migrate to Java NIO instead of old java file I/O (Feedback?)
* Internal Optional usage for nullable values (Feedback?)
Minor:
* Schedule a Bukkit async task instead of creating a thread manually
* Validate ip input string
* Extract validation into single method
* Close all resources safely using try-resources
* More https links
* Add documentation
* Set the same last modification as in the tar archive
* Fix tests
* Comment how the legacy API responded to unknown entries
* Document missing function param
* Document our maxmind dependency modifications
* Include time unit into constant
* More logging for downloading the database
* Add missing return if the database cannot be found
* Delete temporarily file after working with it