ports/55361: Make Balsa2 LDAP installation optional

[Oliver Eikemeier]

Alexander Nedotsukov wrote:

> Over to OpenLDAP maintainer.
> There is a sence to implement similar feature on the bsd.ports.mk level to
> let this works for all ports that depend on OpenLDAP.

Its in ports/Mk/bsd.port.mk since 1.463, use

USE_OPENLDAP=	yes

Fixed by Joe Marcus Clarke <marcus at FreeBSD.org>
in ports/mail/balsa2/Makefile 1.87.

Regards
    Oliver