/etc/openldap/openldap/slapd.conf
配置ACL时，应使用固定的格式：
::= access to [ by [ ] [ ] ]+
---------参数what---------------------------------
::= * | dn[.=] [filter=] [attrs=]
::= [val[/][.]=] |
::= [ , ]
::= | @ | ! | entry | children
-------------参数who-------------------
::= [ * | anonymous | users | self | dn[.]= ]
        [ realanonymous | realusers | realself | realdn[.]= ]
        [dnattr=]
        [realdnattr=]
        [group[/[/]][.