[krbdev.mit.edu #6686] IPv6 support for kprop and kpropd

[nalin@redhat.com via RT]

On Thu, Jul 01, 2010 at 12:42:12PM -0400, Greg Hudson via RT wrote:
> Opening two listener sockets in kpropd is more difficult than I expected, 
> because of the complicated iprop logic.  So I'm committing a variation of 
> your patch.
> 
> Why did you add AI_V4MAPPED to hints in the first getaddrinfo query?

It's more or less a leftover.  It didn't actually have any effect on my
test machine, but it puts that call to getaddrinfo() more in line with
the behavior glibc follows when the hints structure is NULL (which is to
behave as if the supplied flags were (AI_V4MAPPED | AI_ADDRCONFIG)).

Nalin