Modify ldap_result to assert returned error is not an one reserved
for API use.
Modify frontend LDAP operation routines to return an error code.
The returned value will be used to determine if an unsolicited notification
should be sent to the client.
Need to review returned error codes.  Namely some LDAP_PROTOCOL_ERROR
will like need to be changed (as they will cause unsolicited notifications).

Update error strings and cldap misuse of server error.

Add place holder for handling LDAPv3 extended operations (coming soon).

Initial version of new mail500.

changed significantly.

specific which methods may be used.  This will facilate development
of a slapd config directive "passwordMethod ..." to specify which
methods should be allowed.

Use everywhere.
Apply search ACLs to operational attributes.
Only provide operational attributes when explicitly requested.

tests: use "ldapadd" instead of "ldapmodify -a"

Leave only LDAPv2+ and LDAPv3.

3 doesn't work YET.

Add sasl.c to libldap_r.dsp.

Skip over referrals that might exist in EXOP result.

  !defined( DOS ) && !defined( MACOS )
Add detection for read & recv/send for later use.

verify uid/gid are positive, not non-negative.

used to fetch the pw_passwd which is than passwd to crypt().
getspnam() is used instead of getpwnam() when available.
Added configration detection of pw_passwd, shadow.h, getpwnam()
and getspnam().