Fix udp_preference_limit with SRV records

In sendto_kdc:resolve_server() when resolving a server entry with a
specified transport, defer the resulting addresses if the strategy
dictates that the specified transport is not preferred.  Reported by
Jochen Hein.

https://github.com/krb5/krb5/commit/bc7594058011c2f9711f24af4fa15a421a8d5b62
Author: Greg Hudson <ghudson@mit.edu>
Commit: bc7594058011c2f9711f24af4fa15a421a8d5b62
Branch: master
 src/lib/krb5/os/sendto_kdc.c |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)