(krb5_rd_req): allow caller to pass in a key in the auth_context, they way processes that doesn't use the keytab can still pass in the key of the service (matches behavior of MIT Kerberos).
(krb5_rd_req): allow caller to pass in a key in the auth_context, they
way processes that doesn't use the keytab can still pass in the key of
the service (matches behavior of MIT Kerberos).


git-svn-id: 193148810cf65385f3a195dbc9a8b504846da3a2@12875 ec53bebd-3082-4978-b11e-865c3cabbd6b

madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal