nominatim: restrict fail2ban to 429 abusers
nominatim: restrict fail2ban to 429 abusers

403 are application-specific blocks for which IP-based
bans might not always be ideal.

zerebubuth/openstreetmap-chef,openstreetmap/chef,Firefishy/chef,gravitystorm/chef,zerebubuth/openstreetmap-chef,tomhughes/openstreetmap-chef,zerebubuth/openstreetmap-chef,Firefishy/chef,Firefishy/chef,openstreetmap/chef,tomhughes/openstreetmap-chef,Firefishy/chef,gravitystorm/chef,zerebubuth/openstreetmap-chef,tomhughes/openstreetmap-chef,zerebubuth/openstreetmap-chef,zerebubuth/openstreetmap-chef,Firefishy/chef,openstreetmap/chef,Firefishy/chef,tomhughes/openstreetmap-chef,gravitystorm/chef,gravitystorm/chef,tomhughes/openstreetmap-chef,Firefishy/chef,openstreetmap/chef,tomhughes/openstreetmap-chef,gravitystorm/chef,openstreetmap/chef,openstreetmap/chef,openstreetmap/chef,tomhughes/openstreetmap-chef,gravitystorm/chef,zerebubuth/openstreetmap-chef,gravitystorm/chef,zerebubuth/openstreetmap-chef,tomhughes/openstreetmap-chef,openstreetmap/chef,gravitystorm/chef,Firefishy/chef