"user1,user2 group1,group2"....Both users and groups are optional, so "user1", " group1", "", "user1 group1", "user1,user2 group1,group2...,group2
代表的是用户user1和user2,以及组group1和group2可以执行相关管理员操作,具体可以参考Apache官网的说明。..."user1,user2 group1,group2"....Both users and groups are optional, so "user1", " group1", "", "user1 group1", "user1,user2 group1,group2