if base is blank disable the base option to let nslcd attempt search base autodiscovery
if base is blank disable the base option to let nslcd attempt search base autodiscovery

git-svn-id: 42347dce00c86f9aec5f22b61aa49406f8a6f818@880 ef36b2f9-881f-0410-afb5-c4e39611909c

arthurdejong/nss-pam-ldapd,arthurdejong/nss-pam-ldapd,arthurdejong/nss-pam-ldapd