net/http only sets Request.TLS for *tls.Conn or conns implementing ConnectionState(). Our listener wrapped tls.Server in httpConnCtx with an embedded net.Conn, so TLS was never surfaced and r.TLS stayed nil. That triggered the HTTP→HTTPS permanent redirect on every request for HTTPS rules.
Add ConnectionState() on httpConnCtx delegating to the underlying TLS conn.
Add tests for TLS forwarding and plain TCP.
fix https://github.com/fosrl/pangolin/issues/2952 issue by setting the incoming host header to the outgoing one by the reverse proxy, this was the default behaviour when using single proxy but now since we use more features it now rewrites the host header
Preserve optional ResponseWriter interfaces through statusCapture so httputil.ReverseProxy can hijack upgraded websocket connections. Add a regression test covering websocket traffic through the HTTP handler path.
Owen