Use port-sockets.h macros in cc_kcm, sendto_kdc

Use SOCKET_CONNECT in cc_kcm.c and sendto_kdc.c to prevent SIGPIPE on
BSD-like systems.  Use other port-sockets.h macros in cc_kcm.c in case
it is ever used on Windows.

https://github.com/krb5/krb5/commit/2aaf0e74805e295358627ac1e5d589d625d8e6b0
Author: Greg Hudson <ghudson@mit.edu>
Commit: 2aaf0e74805e295358627ac1e5d589d625d8e6b0
Branch: master
 src/lib/krb5/ccache/cc_kcm.c |   34 ++++++++++++++++++----------------
 src/lib/krb5/os/sendto_kdc.c |    3 ++-
 2 files changed, 20 insertions(+), 17 deletions(-)