yast2-nis-client from YaST:SLE-15:SP4 project

需要 openSUSE Leap 15.4 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/YaST:SLE-15:SP4/openSUSE_Leap_15.4/YaST:SLE-15:SP4.repo
zypper refresh
zypper install yast2-nis-client