Implement proxy_all for proxying entire domains

I wanted to add another domain behind a reverse proxy. The existing
reverse proxy functionality seemed to only work for subpaths so I
implemented this. (I'm happy with another better way if you can point one
to me.)

I also implemented streaming responses when reverse proxying. That way
the responses stay as similar as possible to the upstream server.

src/main.rs

@@ -238,6 +238,25 @@ async fn handle_connection(
         None => {}
     }
 
+    #[cfg(feature = "proxy")]
+    if let Some(pr) = &srv.server.proxy_all {
+        let host_port: Vec<&str> = pr.splitn(2, ':').collect();
+        let host = host_port[0];
+        let port: Option<u16>;
+        if host_port.len() == 2 {
+            port = host_port[1].parse().ok();
+        } else {
+            port = None;
+        }
+
+        let mut upstream_url = url.clone();
+        upstream_url.set_host(Some(host)).unwrap();
+        upstream_url.set_port(port).unwrap();
+
+        revproxy::proxy_all(pr, upstream_url, con).await?;
+        return Ok(());
+    }
+
     #[cfg(feature = "proxy")]
     match &srv.server.proxy {
         Some(pr) => match url.path_segments().map(|c| c.collect::<Vec<_>>()) {