compilation bug fix for bsds

[Rick Moen]

Quoting Yarin (yarin at warpmail.net):

> Not handling SIGPIPE is definitely a big deal, especially when that
> vulnerability lies in something that popular, (IMHO, SIGPIPE was a
> really bad design idea in the first place, but that's besides the
> point) but it looks like there's been a patch for that since 2003; so
> I would imagine that there aren't any djbdns versions with this
> problem in service any more.

Yarin --

Of the four maintained forks of djbdns, I've verified that Mark
Johnson's zinq-djbdns and Prasad J. Pandit's Red Hat djbdns implement
that patch.  I see no sign that it's in the other two (though I've 
not checked closely).  And, sadly, there are still many people running
unmodified 1.05.