Add caddy reverse proxy websocket example

docs/MANUAL.md

@@ -1027,6 +1027,14 @@ ProxyPass /webirc http://127.0.0.1:8067 upgrade=websocket
 ProxyPassReverse /webirc http://127.0.0.1:8067
 ```
 
+On Caddy, websocket proxying can be configured with:
+
+```
+handle_path /webirc {
+  reverse_proxy ircd:8067
+}
+```
+
 ## Migrating from Anope or Atheme
 
 You can import user and channel registrations from an Anope or Atheme database into a new Ergo database (not all features are supported). Use the following steps: