Check if geoip is installed

[howdu]

If the geoip package is optional the location should default to false, otherise you must publish config and change this manually.

For backwards compatibility updated this to check if geoip function exists.

[lrljoe]

just need to review any impacts from the secondary change, and look at location overall from a headers perspective, but the change overall makes sense.

However can I ask that you kindly split the PR into two, so that the change for the failed login listener is separate to this.

Wholly appreciate both fixes, just want to make sure its managed

Finally, please target develop for the PR, as that's where changes go first