系统：freebsd
给openldap添加memberof属性时，
执行命令：ldapadd -Q -Y EXTERNAL -H ldapi:/// -f memberofconfig.ldif
提示：ldapadd: not compiled with SASL support
我的 memberof_config.ldif文件内容如下
dn: cn=module,cn=config
cn: module
objectClass: olcModuleList
olcModuleLoad: memberof
olcModulePath: /usr/local/libexec/openldap
dn: olcOverlay={0}memberof,olcDatabase={1}mdb,cn=config
objectClass: olcConfig
objectClass: olcMemberOf
objectClass: olcOverlayConfig
objectClass: top
olcOverlay: memberof
olcMemberOfDangling: ignore
olcMemberOfRefInt: TRUE
olcMemberOfGroupOC: groupOfNames
olcMemberOfMemberAD: member
olcMemberOfMemberOfAD: memberOf
这是什么问题，该怎么解决？求助！！