Merge from vendor branch TNF:

Merge from vendor branch TNF:
Importing net-ldap version 0.2.2.

Net::LDAP for Ruby (also called net-ldap) implements client access for the
Lightweight Directory Access Protocol (LDAP), an IETF standard protocol for
accessing distributed directory services. Net::LDAP is written completely in
Ruby with no external dependencies. It supports most LDAP client features
and a subset of server features as well.

Net::LDAP has been tested against modern popular LDAP servers including
OpenLDAP and Active Directory. The current release is mostly compliant with
earlier versions of the IETF LDAP RFCs (2251-2256, 2829-2830, 3377, and 3771).
Our roadmap for Net::LDAP 1.0 is to gain full *client* compliance with
the most recent LDAP RFCs (4510-4519, plus portions of 4520-4532).