remove rewrite if webmail is on root

core/nginx/conf/nginx.conf

@@ -91,8 +91,10 @@ http {
       {% endif %}
 
       location {{ WEB_WEBMAIL }} {
+        {% if WEB_WEBMAIL != '/' %}
         rewrite ^({{ WEB_WEBMAIL }})$ $1/ permanent;
         rewrite ^{{ WEB_WEBMAIL }}/(.*) /$1 break;
+        {% endif %}
         include /etc/nginx/proxy.conf;
         client_max_body_size {{ MESSAGE_SIZE_LIMIT|int + 8388608 }};
         proxy_pass http://$webmail;