Remove WANT_OPENLDAP_SASL from a few ports as it prevents users from easily
installing a desktop environment and samba.
WANT_OPENLDAP_SASL must not be used in invidual ports Makefiles.
Note: there is a wip to rewrite the handling of openldap in ports
With hat: portmgr
Reviewed by: mat
Differential Revision: https://reviews.freebsd.org/D9083