Returns a part of the relative name of self, if set.
Note that the relative name might not be set, nor the specific part.
Examples of a part might be the 'OU' (organizational unit) or the 'CN' (common name). Only the value of that part of the RDN
is returned.
| part |
a RDN type string or OID. |
|
The relative name part if set, or NULL |