we were doing a forward+reverse lookup, which seems above and beyond the
call of duty, especially given that getaddrinfo() can be persuaded to
return a canonical name (this is what unix/uxnet.c does).
Unfortunately, I'm unable to test this at all as Win98 doesn't have
getaddrinfo(); hopefully I'll be able to find a mug with a modern version
of Windows to check it's not completely broken.
I think the effects of this are mostly cosmetic -- the canonical name is
used for window titles (and some people have been annoyed at the new
behaviour), other displays, and probably also for proxy exclusions.
[originally from svn r5614]
b33d9e4a44