Fix legacy provider not working with OpenVPN 2.x

Author: schwabe

main/src/main/java/de/blinkt/openvpn/VpnProfile.java

@@ -388,7 +388,7 @@ public String getConfigFile(Context context, boolean configForOvpn3) {
             cfg.append(String.format("setenv IV_PLAT_VER %s\n", openVpnEscape(versionString)));
 
             if (mUseLegacyProvider)
-                cfg.append("provider legacy default\n");
+                cfg.append("providers legacy default\n");
 
             if (!TextUtils.isEmpty(mTlSCertProfile) && mAuthenticationType != TYPE_STATICKEYS)
                 cfg.append(String.format("tls-cert-profile %s\n", mTlSCertProfile));

main/src/ui/java/de/blinkt/openvpn/core/OpenVPNThreadv3.java

@@ -32,9 +32,8 @@ public class OpenVPNThreadv3 extends ClientAPI_OpenVPNClient implements Runnable
         System.loadLibrary("ovpn3");
     }
 
-    private VpnProfile mVp;
-    private OpenVPNService mService;
-    private ClientAPI_OpenVPNClientHelper clientHelper = new ClientAPI_OpenVPNClientHelper();
+    private final VpnProfile mVp;
+    private final OpenVPNService mService;
 
     public OpenVPNThreadv3(OpenVPNService openVpnService, VpnProfile vp) {
         mVp = vp;