Firewall changes and User Agent policy

[MrKrisKrisu]

Dear @Traewelling/api-consumer,

we have tightened our API User-Agent policy after a recent incident.

Empty or generic User-Agents, including simple defaults like curl or Guzzle, are now blocked by default and our webserver will return HTTP 403.

Please use a meaningful User-Agent that identifies your application/project and includes a contact option, such as a website, email, or Git repository.

This helps us contact API consumers in case of issues.

We have also blocked some suspicious AS networks in our Firewall, but this should not affect regular API usage.