Add a new "-h" option to the gssd daemon that enables support for
host based (kerberos service principal) initiator credentials in
the default keytab file. This option won't actually be useful until
the corresponding kernel changes are committed.

Reviewed by:	jhb
Document the new "-h" option for the gssd daemon.
This is a content change.

Reviewed by:	jhb
Make sure the krb5 status variables are correctly initialized.