[sork] vacations - without spamming mailinglist

[Lars Hecking]

> >  There is no way to do this with the standard vacation(1) command.
> 
> Not exactly, but the -t option is very close.  I've put it on the todo list.
 
 vacation on FreeBSD accepts -t for compatibility, but ignores it.
 vacation on NetBSD/OpenBSD doesn't have a -t option. These three suport -r,
 but the granularity is days rather than seconds/minutes/hours/days/weeks.