[MacPorts] #29298: openldap: add support for backends (was: openldap @2.4.21 add back-ldap variant)

[MacPorts]

#29298: openldap: add support for backends
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  Reporter:  chrisi@…     |      Owner:  mascguy
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  openldap     |
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Ticket URL: <https://trac.macports.org/ticket/29298#comment:6>
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