HostPattern
Represents a single host pattern for matching hostnames.
Supported patterns:
"example.com"— exact match"*.example.com"— matches exactly one subdomain level (e.g.,api.example.combut NOTa.b.example.com)"**.example.com"— matches one or more subdomain levels (e.g.,api.example.com,a.b.example.com)"**"— matches everything
All matching is case-insensitive.