Before submitting your PR, please review the following checklist:

• CHOOSE CORRECT BRANCH: if filing a bugfix/enhancement
  against certain release version, choose 0.9, 0.10 or 0.11 branch,
  for dev-edition use master branch
• CONSIDER adding a unit test if your PR resolves an issue
• LIST ISSUES this PR resolves
• MAKE SURE this PR doesn't break existing tests
• KEEP PR small so it could be easily reviewed.
• AVOID making unnecessary stylistic changes in unrelated code
• ACCOMPANY each new failregex for filter X with sample log lines
  within fail2ban/tests/files/logs/X file

Added geoip lookup in filter in method _inIgnoreIPList, which checks the countries that should be ignored in __ignoreGeoSet attribute. The __ignoreGeoSet is managed either by ignoregeo statement in jail config or by addignoregeo/delignoregeo commands. If the IP has geolocation country code from the __ignoreGeoSet the IP is ignored.

This PR was inspired by our implementation in websupport.sk that was just hardcoded. It was not sustainable to patch f2b every time a new version was available and it may be a generally good idea to have a geo IP ignore option available.

This will resolve #1854.