OPENLDAP_REL_ENG_2_2, please test

["Kurt D. Zeilenga" <Kurt@OpenLDAP.org>]

I've incorporated many significant changes from HEAD
into 2.2, including those to back-bdb to address
various database/locking issues.  Please test.

Also, please check if I've incorporated everything
needing to get released and nothing which shouldn't
be released.

Thanks, Kurt