nss-pam-ldapd is actively maintained while nss_ldap/pam_ldap are not
updated in a while. nss-pam-ldapd is more robust too (I had a similar
problem like https://bugs.archlinux.org/task/33672 that didn't occur with
nss-pam-ldapd; and according to that bug report actually a
nss_ldap/pam_ldap setup is simply broken). According to the author (
http://arthurdejong.org/nss-pam-ldapd/) nss-pam-ldapd is faster and more
easily to debug (I didn't measured performance, but indeed nss-pam-ldapd is
easier to debug, since it's service nslcd have a nice log output). I think
Fedora and Mageia uses nss-pam-ldapd for default instead nss_ldap/pam_ldap.
Even our Wiki (https://wiki.archlinux.org/index.php/OpenLDAP_Authentication)
is recommending nss-pam-ldapd instead of nss_ldap/pam_ldap (actually, if
you follow our Wiki using nss_ldap/pam_ldap you will have a non-working
LDAP setup).
So I suggest to drop nss_ldap/pam_ldap to AUR and put nss-pam-ldapd on
[Extra] repository.
--
Thiago Kenji Okada