krb5_get_credentials.
KRB5_AUTH_CONTEXT_CLEAR_FORWARDED_CRED: make forward credentials be
unencrypted, for compatibility with mit kerberos and java kerberos.
krb5_javakt_ops: export
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@15148 ec53bebd-3082-4978-b11e-865c3cabbd6b