are there any objection in cleaning up libexec/telnetd source code,
	where tons of unused code fragment are hidden within #ifdef?
	without unifdef(1)'ing them, we cannot really know where the
	(possible) vulnerabilities are.

	for example, the following symbols does not fit our use, and i guess
	almost noone is interested in these any longer:
		CRAY
		CRAY2
		_SC_CRAY_SECURE_SYS
		UNICOS5

itojun