r8740: Extend the rdn_name module to handle adding the rdn as an attribute. ie:

r8740: Extend the rdn_name module to handle adding the rdn as an attribute.  ie:

dn: cn=foo,ou=bar
objectClass: person

implies

dn: cn=foo,ou=bar
objectClass: person
cn: foo
(as well as a pile more default attributes)

We also correct the case in the attirbute to match that in the DN
(win2k3 behaviour) and I have a testsuite (in ejs) to prove it.

This module also found a bug in our provision.ldif, so and reduces
code complexity in the samdb module.

Andrew Bartlett