Our OpenLDAP is compiled (as is the default) without client support for CLDAP (connection-less LDAP, over UDP). This is primarily due to CLDAP never making it into a standard, as evidenced by its proposed move to historical status as RFC3352.
However, CLDAP is used by Active Directory, and Likewise-Open requires its (client) openldap library to support CLDAP in order to talk with Active Directory. This makes Likewise-Open 5 compile and bundle its own OpenLDAP library for the sole purpose of getting CLDAP client support built-in.
As Likewise-Open 5 is scheduled to move to main on this cycle, it makes sense to try to avoid shipping a private OpenLDAP library with it. Outcome of the discussion at UDS with Howard Chu was that enabling -DLDAP_CONNECTIONLESS should not have adverse performance or stability consequences.
Proposed patch
Passes all build tests. Querying cldap: URLs no longer returns "Could not parse LDAP URI(s)" but that's about as far as I could validate that cldap was enabled.