Returns the Kerberos realm a trust realm answers as: the process's krb5.realm for the default realm, the realm's own override for another.
krb5.realm
the trust realm id
the Kerberos realm name, or the empty string when it names none
Returns the Kerberos realm a trust realm answers as: the process's
krb5.realmfor the default realm, the realm's own override for another.