Add Host HTTP header to MS-KKDCP requests

Some web servers require a Host HTTP header for TLS connections with
SNI (server name indicator).  It is also required for virtual hosts.

https://github.com/krb5/krb5/commit/69c8662190bcd46f2300d0cea139681001ea5b26
Author: Christian Heimes <cheimes@redhat.com>
Committer: Greg Hudson <ghudson@mit.edu>
Commit: 69c8662190bcd46f2300d0cea139681001ea5b26
Branch: master
 src/lib/krb5/os/sendto_kdc.c |   18 +++++++++++++-----
 1 files changed, 13 insertions(+), 5 deletions(-)