[BUG] Caddy v2.9.0 Updates

[kernelb00t]

16.50 2025/01/04 13:23:57 [INFO] exec (timeout=0s): /usr/local/go/bin/go build -o /usr/bin/caddy -ldflags -w -s -trimpath -tags nobadger,nomysql,nopgx 
53.90 # github.com/tailscale/caddy-tailscale
53.90 /go/pkg/mod/github.com/tailscale/[email protected]/module.go:34:37: cannot use getTCPListener (value of type func(c "context".Context, _ string, addr string, _ net.ListenConfig) (any, error)) as caddy.ListenerFunc value in argument to caddy.RegisterNetwork
53.90 /go/pkg/mod/github.com/tailscale/[email protected]/module.go:35:41: cannot use getTLSListener (value of type func(c "context".Context, _ string, addr string, _ net.ListenConfig) (any, error)) as caddy.ListenerFunc value in argument to caddy.RegisterNetwork
53.90 /go/pkg/mod/github.com/tailscale/[email protected]/module.go:36:41: cannot use getUDPListener (value of type func(c "context".Context, _ string, addr string, _ net.ListenConfig) (any, error)) as caddy.ListenerFunc value in argument to caddy.RegisterNetwork

Seems that the new Caddy v2.9.0 broke things.

Env:
Custom Dockerfile, building with Go 1.23 (golang:1.23-alpine3.20), XCADDY_VERSION=v0.4.4, and caddy-tailscale on f21c01b.

[kernelb00t]

That's the problem:
The type signature of ListenerFunc changed.
https://github.com/caddyserver/caddy/blame/master/listeners.go#L679

[kernelb00t]

Relevant PR: #83