feat: add support of the nginx port_in_redirect directive (#627)

Close: #625 <hr>This is an automatic backport of pull request #626 done by [Mergify](https://mergify.com).

config/config.ini.custom

@@ -112,6 +112,11 @@ real_ip_set_from=172.16.0.0/12,192.168.0.0/16,10.0.0.0/8
 # (1 => enabled, 0 => disabled)
 server_tokens=1
 
+# Enables or disables specifying the port in absolute redirects issued by nginx.
+# see http://nginx.org/en/docs/http/ngx_http_core_module.html#port_in_redirect
+# (1 => on, 0 => off)
+port_in_redirect=1
+
 # If >0, override the global setting [log]/max_size_before_rotation
 # for the nginx daemon (only)
 max_size_before_rotation=-1

config/nginx.conf

@@ -78,6 +78,12 @@ http {
         server_tokens off;
     {% endif %}
 
+    {% if MFSERV_NGINX_PORT_IN_REDIRECT == "1" %}
+        port_in_redirect on;
+    {% else %}
+        port_in_redirect off;
+    {% endif %}
+
     lua_package_path '{{LUA_PACKAGE_PATH}}';
     lua_code_cache on;