Both quite some time ago. The telnet options are pretty standard, actually. This code has killed all the way up to ultras running 2.5.1. I've also tidied up a couple of little things, they are the now-unquoted lines. The affected machine will ping but good luck getting a login prompt or doing anything much else on it.
Some machines seem to shrug it off, while on others it is devestating.
With persistence, it seems to take out most of 'em sooner or later. The machine doesn't actually crash, it goes into deep hibernation. Leave it alone and it'll come back. From an anonymous contributor. Should compile under UNIX as well.