Revert "blockcheck: enable ECN in windows"

			# ts fooling requires timestamps. they are disabled by default in windows.

			echo enabling tcp timestamps

			netsh interface tcp set global timestamps=enabled >/dev/null

			# they may not enable additional fake protection if ECN is enabled

			echo enabling ECN

			netsh int tcp set global ecn=enabled >/dev/null

			;;

		*)

			echo $UNAME not supported