Fix Autotools not enabling OpenLDAP-specific functionality

Fix Autotools not enabling OpenLDAP-specific functionality

Origin: upstream, https://github.com/curl/curl/commit/0ac6108856b9d500bc376d1d7e0b648d15499837.patch
Bug: https://github.com/curl/curl/issues/11372
Applied-Upstream: 8.2.0, https://github.com/curl/curl/commit/0ac6108856b9d500bc376d1d7e0b648d15499837
Reviewed-By: John Scott <jscott@posteo.net>
Last-Update: 2023-07-25

The non-OpenLDAP code paths are less tested, less featureful, less secure,
and omitted in the build system by accident. It has been discovered that this
also mitigates curl not being able to make LDIF output when attributes have
binary values.

Gbp-Pq: Name Use-OpenLDAP-specific-functionality.patch