Sometimes telnet spams this sequence

code/espurna/telnet.ino

@@ -67,8 +67,8 @@ void _telnetData(unsigned char clientId, void *data, size_t len) {
     // Capture close connection
     char * p = (char *) data;
 
-    // C-d is sent as two bytes
-    if (len == 2) {
+    // C-d is sent as two bytes (sometimes repeating)
+    if (len >= 2) {
         if ((p[0] == 0xFF) && (p[1] == 0xEC)) {
             _telnetClients[clientId]->close();
             return;