* walk_rtree.c (dbgref_dump_principal):Move here from

* walk_rtree.c (dbgref_dump_principal):Move here from
        gc_frm_kdc.c so make check works

* gc_frm_kdc.c (krb5_get_cred_from_kdc_opt): Fill in length of
realm after populating from client

* copy_princ.c (krb5_copy_principal): Always allocate space for realms even if they are empty.  Always defensively null terminate.  Note that realms may still have internal null characters; they are not strings.

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/referrals@18568 dc483132-0cff-0310-8789-dd5450dbe970