SASL mech removed from backend bind callback (as SASL is managed by frontend)
Changes to some backends are untested (as I don't have all dependent
software install)
Add comment concerning sequencing issues which need to be resolved
by reworking of connection state machine. Add note that a race
condition exists until this rework is complete.
Rework extended operations to return pointer to static error text.
Updates to extended operation framework to support arbitrary
referrals and extended results without OIDs.
Updated passwd extended operation to support returning update_refs
as needed. Needs replog support.
Add controls to extended ops API signatures, need impl.
Update password to support optional server side generation of
new password, verification of old password, and changing of
non-bound user's passwords.
