* sock2p.c: New file.

* sock2p.c: New file.
(inet_ntop): Define if system doesn't provide it.
(sockaddr2p): New function.
* Makefile.in (SRCS, OBJS): Add sock2p.
* kdc_util.h (inet_ntop, sockaddr2p): Declare them.

* network.c (add_fd): New function.  Reallocate udp_port_fds array as needed
here.
(setup_port): Use add_fd to record new sockets.  Use inet_ntop unconditionally.
Disable ipv6 support until process_packet and friends will support it.
(process_packet): Ignore ECONNREFUSED when reading UDP packets.  Fill in port
field of faddr properly, dependent on address family.  Use sockaddr2p when
logging source address.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@12109 dc483132-0cff-0310-8789-dd5450dbe970