Improve admin-errormail antispam mode for Facade calls

[following5]

The antispam mode currently works on a per-service basis, with the service being the part of the URL between host and ?-arguments. We recently got tons of error emails from Facade calls for requesting different map tiles, because the arguments for OCPL page router are not separated by ? but by /.

Possible solutions:

• Detect non-OKAPI request URLs and use only the first service-name component for antispam detection.
• Add global, service-independent spam limit.