Wrapped ldap_rename() and ldap_rename_s()

[Michael Ströder]

HI!

Although being a real C illiterate it seems that I managed to wrap
ldap_rename() and ldap_rename_s() found in OpenLDAP 2 libs. See
(expired) ID draft-ietf-ldapext-ldap-c-api.

Please test it! It's somewhat likely that I did something wrong.

See diffs:
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/python-ldap/python-ldap/Modules/LDAPObject.c.diff?r1=1.23&r2=1.24

Also added Demo/rename.py. Note: rename() only works with LDAPv3
servers.

Ciao, Michael.