Allow http for LanguageTool

app/src/main/java/eu/faircode/email/LanguageTool.java

@@ -42,6 +42,7 @@ import org.json.JSONObject;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.net.HttpURLConnection;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.List;
@@ -81,7 +82,7 @@ public class LanguageTool {
         Log.i("LT uri=" + uri);
 
         URL url = new URL(uri.toString());
-        HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
+        HttpURLConnection connection = (HttpsURLConnection) url.openConnection();
         connection.setRequestMethod("GET");
         connection.setDoOutput(false);
         connection.setReadTimeout(LT_TIMEOUT * 1000);
@@ -433,7 +434,7 @@ public class LanguageTool {
         return (!TextUtils.isEmpty(lt_user) && !TextUtils.isEmpty(lt_key));
     }
 
-    private static void checkStatus(HttpsURLConnection connection) throws IOException {
+    private static void checkStatus(HttpURLConnection connection) throws IOException {
         int status = connection.getResponseCode();
         if (status != HttpsURLConnection.HTTP_OK) {
             String error = "Error " + status + ": " + connection.getResponseMessage();