Might break LDAPv2 partial results

the same.

(I previously said I'd only do this in re20 but its easier to do
here... and no big deal for those wanting to work on it to
define the macro via the environment)

peername, and other 2.0 acl options.

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Improve interoperability when of scred is present but empty.

be closed on other end could get reused by a new internal connection.

into ldap_pvt_ name space.

search scope defaulting.