from Paul Turgyan of University of Michigan.

Add additional notices.  Likely need to add a quiet mode.

Replace 'negotiated' with 'interactive' bind
Add hooks for SASL/EXTERNAL
Disable SASL security layers
Rework SASL command line and config file parameters

Use -DSLAPD_SCHEMA_COMPAT to use 1.x compatible schema (deprecated).

Modified by me to dn_*() and attr_*() functions and to use
uidObject and to handle search scopes better.  Could use some
more work.  A fun project for anyone wanting to learn how
backends work.
Modified dn_parent and dn_rdn to accept be=NULL (to bypass
be_issuffix check).  These functions should be generalized
and moved to -lldap.  A project for another day.

Remove disable write sync (dbcachenowsync) in master (for concurrency test).

introduction of pid/agrs parameters to the test-suite slapd.conf files;
creation of sub-directory test/var for storage of pid/args files during test;
update of the slapd and slapd.conf man pages.
(The change reduces dependency on ldapconfig.h, since SLAPD_PIDEXT
 and SLAPD_ARGSEXT are deleted from the code.)

add/merge as we now free strings agressively.  Improved debug
message to include name of missing required attribute and added
check for 'operational attributes'.  This check should be used
everywhere we need to test for operational attributes (add/modify).
Also, enabled schema checking for tests (and fixed resulting
problems by adjusting oc.conf).

  "Check that the entry has no writers before removing it from the
  cache" sounds more sensible to me than "check that it *has* writers"
  before removing it.
I've also changed the default cachesize for tests to 4.  This
should help discover such problems.