Metacat

We are planning to trim the nceas ldap to have one subtree ou=Account which has the real users. The other subtrees, such as o=unaffiliated, will be an alias to an entry in ou=Account. The alias entry looks like:

dn: uid=wu,o=unaffiliated,dc=ecoinformatics,dc=org
 objectClass: alias
 ObjectLcass: extensibleObject
 uid: wu
 aliasedObjectName:  uid=tao,ou=Account,dc=ecoinformatics,dc=org

LDAP doesn't provide the dereference mechanism for the bind. It only provides the search dereference:
ldapsearch -x -a search -h ldap-dev.ecoinformatics.org -b uid=wu,o=unaffiliated,dc=ecoinformatics,dc=org

We need to add code on Metacat AuthLdap to handle the alias login.