[krbdev.mit.edu #8530] krb5- 1.15 KDC network performance issue

[Greg Hudson via RT]

Okay, that sounds like two bugs we need to fix:

1. If a wildcard address is explicitly specified, we don't set pktinfo 
on the socket.  The one-second latency you observed likely occurs 
because the KDC sends the reply on the wrong source address and the 
client doesn't receive it.

2. If no address is specified and the machine doesn't have any IPv6 
addresses (not even a loopback address), the KDC fails to start after 
failing to bind to the IPv6 wildcard address.  The symmetric problem 
might exist for a machine with only IPv6 addresses.