* allow client to be non-existant (should probably check for "local realm")
* if server isn't found and it is a request for a krbtgt, try to find
a realm on the way to the requested realm
* update the transited encoding iff client-realm != server-realm != tgt-realm
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@3463 ec53bebd-3082-4978-b11e-865c3cabbd6b