Properly close socked which is already in disconnection state

The socker might be already disconnecting due to FIN from the other side,
in this case still close the socket to finish the operation but do not reset
the ISR, because we will not get another SNIR_DISCON and would end up in inifite loop.

Author: pinkavaj

adafruit_wiznet5k/adafruit_wiznet5k_socket.py

@@ -247,7 +247,7 @@ def __exit__(self, exc_type, exc_val, exc_tb) -> None:
         _the_interface.release_socket(self._socknum)
         if self._sock_type == SOCK_STREAM:
             _the_interface.write_snir(
-                self._socknum, 0xFF
+                self._socknum, 0xFF & (~wiznet5k.adafruit_wiznet5k.SNIR_DISCON)
             )  # Reset socket interrupt register.
             _the_interface.socket_disconnect(self._socknum)
             mask = (