Handle SNSR_SOCK_CLOSE_WAIT during accept()

If we receive SYN, ACK and the we get FIX from the other side really fast,
the connection state can go straight to the closing phase. If that happends lets
just finis the close and continue listening.

Author: pinkavaj

adafruit_wiznet5k/adafruit_wiznet5k_socket.py

@@ -402,6 +402,9 @@ def accept(
         ):
             if self._timeout and 0 < self._timeout < time.monotonic() - stamp:
                 raise TimeoutError("Failed to accept connection.")
+            if self._status == wiznet5k.adafruit_wiznet5k.SNSR_SOCK_CLOSE_WAIT:
+                self._disconnect()
+                self.listen()
             if self._status == wiznet5k.adafruit_wiznet5k.SNSR_SOCK_CLOSED:
                 self.close()
                 self.listen()