basefilter gone?

1.2 had a property in the config called basefilter .. this is no longer there.  

setEntriesFromDirectory() is now using some combination of $this->requestedEntries and $this->filterAttribute but I'm not seeing how to use this to construct something like the following:

```
    'basefilter' => '(&(uid=%uid)(objectClass=personTypeA)(ou:dn:=personGroupA))',
```
