>> Looks fine. Perhaps it would be also useful to parse port as part
>> of hostname? Like:
>> 	rsh -l username host:port
>> 	rsh username@host:port
>
>I thought about that too, maybe I'll go for that in a second round (if I
>find time; I need the patch for a project).

what about ipv6 address literals?  or do we *already* have to enclose
and quote them thusly:

	rsh \[::1]

???

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