Fix for missing emoncms_path

This fixes the issue where the emoncms path is ignored in the webui and not used to generate emoncms requests.

src/app_config.cpp

@@ -222,6 +222,7 @@ void config_save_emoncms(bool enable, String server, String path, String node, S
   }
 
   config.set(F("emoncms_server"), server);
+  config.set(F("emoncms_path"), path);
   config.set(F("emoncms_node"), node);
   config.set(F("emoncms_apikey"), apikey);
   config.set(F("emoncms_fingerprint"), fingerprint);

src/emoncms.cpp

@@ -77,7 +77,8 @@ void emoncms_publish(JsonDocument &data)
 
   if (config_emoncms_enabled() && emoncms_apikey != 0)
   {
-    String url = post_path;
+    String url = emoncms_path;
+    url += post_path;
     String json;
     serializeJson(data, json);
     url += F("fulljson=");