完整changelog
https://wiki.samba.org/index.php/Samba_4.7_Features_added/changed
https://wiki.samba.org/index.php/Samba_4.8_Features_added/changed
重点关注change
13.3.2 Samba AD with MIT Kerberos
新增支持MIT kerberos，无影响，环境未安装krb5-devel and krb5-server
13.3.8 Improvements to DNS during Active Directory domain join
samba-tool、samba_dnsupdate指令改进，未使用，且4.8.9无该指令集
13.3.9 Significant AD performance and replication improvements
查询/搜索ad组成员优化，速度提升一倍
13.3.15 CTDB changes
集群不支持不同节点版本，不支持对ctdb集群逐个节点的升级
增加配置CTDB_NFS_CHECKS_DIR
去除配置CTDB_SERVICE_AUTOSTARTSTOP、CTDB_SCRIPT_DEBUGLEVEL
优化NFS Ganesha call-out
数据库相关
10.2.2 Domain member setups require winbindd
10.3.8 Winbind changes
10.4.3 vfs_aio_linux module removed
