从 NIS+ 迁移到 LDAP 文档

附录“Transitioning From NIS+ to LDAP”已从《System Administration Guide: Naming and Directory Services (FNS and NIS+)》移到《System Administration Guide: Naming and Directory Services (DNS, NIS, and LDAP)》中。此外，《System Administration Guide: Naming and Directory Services (DNS, NIS, and LDAP)》的 LDAP 相关章节中还增加了各种组件的说明和示例。但并没有记录新功能。