Move 'Allow Websockets' definitions to host root configuration

This fixes issues with these settings not applying to custom locations
defined under hosts.

backend/templates/proxy_host.conf

@@ -13,6 +13,13 @@ server {
 {% include "_hsts.conf" %}
 {% include "_forced_ssl.conf" %}
 
+{% if allow_websocket_upgrade == 1 or allow_websocket_upgrade == true %}
+proxy_set_header Upgrade $http_upgrade;
+proxy_set_header Connection $http_connection;
+proxy_http_version 1.1;
+{% endif %}
+
+
   access_log /data/logs/proxy_host-{{ id }}.log proxy;
 
 {{ advanced_config }}
@@ -46,12 +53,6 @@ server {
 
 {% include "_hsts.conf" %}
 
-    {% if allow_websocket_upgrade == 1 or allow_websocket_upgrade == true %}
-    proxy_set_header Upgrade $http_upgrade;
-    proxy_set_header Connection $http_connection;
-    proxy_http_version 1.1;
-    {% endif %}
-
     # Proxy!
     include conf.d/include/proxy.conf;
   }