utility functions for handling Distinguished Names

[Norbert K. <nor...@da...>]

Hi,
I wrote up a module which contains ldap_explode_dn and canonical_dn which=20
handles all but two (minor) cases from=20
http://www.openldap.org/ietf/ldapbis/dn.txt correctly.

Please see attached file. This time with inline documentation.

--=20
Norbert Klasen, Dipl.-Inform.
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