Conditional redirects UI

[benjaminpick]

Would it be possible to integrate this plugin with the popular https://github.com/johngodley/redirection so that geo-conditional redirects can be managed there (including loop detection)? This would require adding new actions/filters per PR.

Filter:

• redirection_custom_filters - adding a new custom "matches" type.
  • where can I return the HTML needed? or is it react?
• On save/update: add the custom condition
• On redirect checks: check if custom condition applies
• Log: add/fix the geo-information for debugging purposes