disable weather/wordnik by default if no API keys provided

if no API keys were provided on build then disable updates on boot
and do not hummer API servers with malformed requests

.env.example

@@ -6,12 +6,12 @@ ADMIN_LOGIN=\"plasma\"
 ADMIN_PASS=\"plasma\"
 
 # OpenWeatherMap configuration
-WEATHER_LAT=\"43.0642\" 
-WEATHER_LON=\"141.3469\"
-WEATHER_API_KEY=\"your_OpenWeatherMap_API_Key\"
+#WEATHER_LAT=\"43.0642\" 
+#WEATHER_LON=\"141.3469\"
+#WEATHER_API_KEY=\"your_OpenWeatherMap_API_Key\"
 
 # Wordnik configuration
-WORDNIK_API_KEY=\"your_Wordnik_API_key\"
+#WORDNIK_API_KEY=\"your_Wordnik_API_key\"
 
 # AquesTalk configuration
 AQUESTALK_LICENSE_KEY=\"XXX-XXX-XXX\"

src/service/owm/weather.cpp

@@ -149,9 +149,14 @@ void weather_start() {
 
     firstRunSemaphore = xSemaphoreCreateBinary();
 
-    apiKey = prefs_get_string(PREFS_KEY_WEATHER_APIKEY, String(WEATHER_API_KEY));
-    latitude = prefs_get_string(PREFS_KEY_WEATHER_LAT, String(WEATHER_LAT));
-    longitude = prefs_get_string(PREFS_KEY_WEATHER_LON, String(WEATHER_LON));
+    apiKey = prefs_get_string(PREFS_KEY_WEATHER_APIKEY);
+    latitude = prefs_get_string(PREFS_KEY_WEATHER_LAT);
+    longitude = prefs_get_string(PREFS_KEY_WEATHER_LON);
+
+    if (!apiKey.length()){
+        ESP_LOGW(LOG_TAG, "No weather API key, disabling weather updates!");
+        return;
+    }
 
     int interval_minutes = prefs_get_int(PREFS_KEY_WEATHER_INTERVAL_MINUTES);
     if(interval_minutes == 0) {

src/service/wordnik.cpp

@@ -112,7 +112,12 @@ void wotd_start() {
     firstRunSemaphore = xSemaphoreCreateBinary();
     hasQueries = true;
 
-    apiKey = prefs_get_string(PREFS_KEY_WORDNIK_APIKEY, String(WORDNIK_API_KEY));
+    apiKey = prefs_get_string(PREFS_KEY_WORDNIK_APIKEY);
+
+    if (!apiKey.length()){
+        ESP_LOGW(LOG_TAG, "No wordnik API key, disabling updates!");
+        return;
+    }
 
     int interval_minutes = prefs_get_int(PREFS_KEY_WORDNIK_INTERVAL_MINUTES);
     if(interval_minutes == 0) {