add http-bind proxy route for nginx + apache snippets

mobile apps still use http-bind for XMPP over BOSH

docs/devops-guide/docker.md

@@ -813,10 +813,11 @@ By default this setup is using WebSocket connections for 2 core components:
 * Signalling (XMPP)
 * Bridge channel (colibri)
 
-Due to the hop-by-hop nature of WebSockets the reverse proxy must properly terminate and forward WebSocket connections. There 2 routes require such treatment:
+Due to the hop-by-hop nature of WebSockets the reverse proxy must properly terminate and forward WebSocket connections. There 3 routes require such treatment:
 
 * /xmpp-websocket
 * /colibri-ws
+* /http-bind (XMPP over BOSH still used by mobile clients)
 
 With nginx, these routes can be forwarded using the following config snippet:
 
@@ -833,6 +834,12 @@ location /colibri-ws {
     proxy_set_header Upgrade $http_upgrade;
     proxy_set_header Connection "upgrade";
 }
+location /http-bind {
+    proxy_pass https://localhost:8443;
+    proxy_http_version 1.1;
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection "upgrade";
+}
 ```
 
 With apache, `mod_proxy` and `mod_proxy_wstunnel` need to be enabled and these routes can be forwarded using the following config snippet:
@@ -847,6 +854,9 @@ With apache, `mod_proxy` and `mod_proxy_wstunnel` need to be enabled and these r
         <Location "/colibri-ws/">
             ProxyPass "wss://localhost:8443/colibri-ws/"
         </Location>
+        <Location "/http-bind">
+            ProxyPass "http://localhost:8443/http-bind"
+        </Location>
     </IfModule>
 </IfModule>