search
  % script/console
  >> pp ActiveLdap::Base.search.collect {|dn, attributes| dn.to_s}
  ["dc=clear-code,dc=local",
   "cn=admin,dc=clear-code,dc=local",
   "ou=users,dc=clear-code,dc=local",
   "cn=user1,ou=users,dc=clear-code,dc=local",
   "cn=user2,ou=users,dc=clear-code,dc=local",
   "cn=user3,ou=users,dc=clear-code,dc=local"]
  => nil