www/caddy: update 2.1.1 -> 2.2.0

• Full support for ZeroSSL, a new ACME CA that is a viable alternative to Let's Encrypt.
• We now have full control over our ACME stack! By replacing our previous underlying ACME library (lego) with ACMEz, Caddy can offer:
  • faster config reloads
  • more efficient cert management at scale
  • a more intuitive configuration experience
  • lighter builds
  • structured logs that are consistent with Caddy's other logs (which you have fine-grained control over).
  • (we no longer suffer from the limitations still shared by other lego-based ACME clients)
• Integrated support for Prometheus metrics.
• HTTP/2 server push has been re-introduced, this time better than it was in Caddy 1.
• Warning: The logfmt log encoder has been deprecated and will be removed.
• Customizable DNS resolver for reverse proxy
• Latest HTTP/3 version
• Numerous bug fixes and other enhancements! Notable bug fixes related to:
  • ACME DNS challenge providers
  • Custom resolvers for the DNS challenge
  • ACME EAB (External Account Binding)
  • Panic recovery
  • Startup time when managing lots of certificates
  • Correct port for active health checks (reverse_proxy module)
  • Windows paths
  • File hiding logic (file_server module)
  • Bidirectional streaming (reverse_proxy module; specifically benefits v2ray use)
  • More consistent, structured error logging when produced from HTTP code in Go's standard library
  • New placeholders and log fields, especially pertaining to TLS, ACME, and HTTP

PR: 249916, 249099
Submitted by: Daniel Tihanyi <daniel.tihanyi@tetragir.com> (maintainer)
Relnotes: https://github.com/caddyserver/caddy/releases/tag/v2.2.0