Log Message:
Update caddy to 2.4.1.

2.4.0

Caddy v2.4.0 is our first stable release of 2021, ushering in over 110 patches
including new features and bug fixes. Thank you to the many contributors who
helped make this possible!

Highlights:

- Secure remote management. You can now enable secure remote access to Caddy's
  admin API! It uses TLS mutual authentication, and you can even define
  permissions for different users.
- Config pull at start. Caddy can be configured to load a different config at
  startup. This is useful if your config is federated through a separate system
  that doesn't have the ability to push configs to Caddy. This feature is
  modular, so configurations can be loaded different ways!
- Server identity management. Caddy can automatically manage its own server
  identity certificate, which can be used when negotiating TLS connections with
  peers. This is required when enabling the secure admin API.
- Self-upgrade command. The new caddy upgrade command will replace the current
  Caddy binary with an upgraded one from our website, with all the same modules
  installed, including third-party plugins that are registered on our site! (We
  can use this code to add/remove modules later, too.)
- Configure other apps from the HTTP Caddyfile. The global options block of the
  Caddyfile now allows configuration of Caddy apps other than HTTP (for
  example, dynamic_dns to keep DNS records pointed at your server with a dynamic
  IP address).
- Caddyfile fmt lint check. When running with a Caddyfile, Caddy will emit a
  warning if the Caddyfile is not formatted with caddy fmt.
- New abort directive. The abort directive is a special case of the
  static_response HTTP handler that prevents an HTTP response by aborting the
  handler chain immediately and forcefully closing the connection.
- New error directive. The error directive returns internal error values in the
  HTTP handler chain, as if an HTTP error had occurred, causing your error
  routes to be invoked.
- Configure response interception from Caddyfile. The reverse_proxy is capable
  of intercepting responses from the backend, and now this is exposed in the
  Caddyfile with handle_response.
- Better caddy list-modules output. Now modules are organized by standard and
  non-standard modules, so you can easily see if a Caddy build has been
  customized.
- Configure logging from Caddyfile. The process logs can now be configured from
  the global options of the Caddyfile.
- Better content negotiation. The file server can now be configured to serve
  precompressed sidecar files, and content encoding preferences are better
  configured and honored.
- Dark mode in directory listings. The file server's "browse" file \ 
listings now
  has a dark mode.
- Removed the logfmt log encoder. It was broken anyways, and its deprecation
  has been warned in previous releases.
- Deprecated common_log format. It will be removed in a future release.
- Deprecated health_path in reverse_proxy directive. It has been replaced with
  health_uri and will be removed in the future.
- Numerous bug fixes and improvements. Thanks for the detailed, helpful bug
  reports! We appreciate your collaboration in making Caddy better.

2.4.1

A small patch release that contains a few noncritical but pleasant fixes
(unless you're using /id/ endpoints in the admin API; then you should
definitely get this update).