Log Message:
Update databases/openldap to version 2.2.27.  From now on, we'll be
tracking the latest release on the 2.2.x branch, which is generally
the stable branch of OpenLDAP.  Changes from version 2.2.20 include:

    Fixed bugs in slapd behavior.
    Fixed bugs in various backends (bdb, hdb, ldbm, ldap) for slapd
    Fixed pcache all-attrs bug (ITS#3741)
    Fixed syncrepl runqueue (ITS#3542)
    Fixed ACL dn=* <what> clause
    Fixed ACL val default style parsing crasher (ITS#3700)
    Fixed slapcat unclean exits (ITS#3764)
    Fixed libldap sasl connection assert (ITS#3278)
    Removed broken libldap fast synchronous search result processing (ITS#3612)
    Fixed slap tool log initialization (ITS#3579)
    Fixed slapi modify/increment support (ITS#3522)
    Fixed slapi plugins called multiple times with glue (ITS#3529)
    Fixed slapi 64-bit portability (ITS#3556)
    Fixed libldap fdset re-init for restart (ITS#3524)
    Fixed libldap ldap_extended_operation_s (ITS#3552)
    Added libldap fast synchronous search result processing
    Fixed slurpd replog locking (ITS#3421)
    Fixed slaptest failure if databases cannot be started (ITS#3461)
    Fixed slaptest with dynamically loaded password mechs (ITS#3495)
    Fixed libldap timeout option cleanup (ITS#3487)