The squid configuration should use ldap/server/addition.
r58967 | Bug #37752 Squid: Support ldap/server/addition +++ b/branches/ucs-4.0/ucs-4.0-1/services/univention-squid/conffiles/etc/squid3/squid.conf + getLDAPURIs(configRegistry) *** This bug has been marked as a duplicate of bug 37752 ***
OK: duplicate Nothing to release.