Added fast close

app/src/main/java/com/sun/mail/iap/Protocol.java

@@ -347,6 +347,12 @@ public class Protocol {
      * @return		array of Response objects returned by the server
      */
     public synchronized Response[] command(String command, Argument args) {
+	if ("LOGOUT".equals(command))
+		try {
+			socket.setSoTimeout(10 * 1000);
+		} catch (SocketException ex) {
+			eu.faircode.email.Log.e(ex);
+		}
 	commandStart(command);
 	List<Response> v = new ArrayList<>();
 	boolean done = false;

app/src/main/java/com/sun/mail/imap/protocol/IMAPProtocol.java

@@ -462,8 +462,6 @@ public class IMAPProtocol extends Protocol {
      */
     public void logout() throws ProtocolException {
 	try {
-		if (!authenticated)
-			return;
 	    Response[] r = command("LOGOUT", null);
 
 	    authenticated = false;