New alias.c provided by Stuart Lynne.

Not quite sure if the entry lock handling is correct yet.

Will consider moving to groupOfUniqueNames as part of OpenLDAP 2.0.

referral has been configured in the server.  Fix provided by Hallvard.

This could have caused a crash.

Patch submitted by Chris Smith <csmith@platform.com>

Patch provided by Hallvard B Furuseth <h.b.furuseth@usit.uio.no>.

-DNO_THREADS is now default.

Suggested by Jauder Ho <jauderho@transmeta.com>.

Fix suggested by Hallvard Furuseth <h.b.furuseth@usit.uio.no>.