libdroplet from home:agrisv:bareos-21.0 project

需要 CentOS 7 ，用 root 執行：

cd /etc/yum.repos.d/
wget https://download.opensuse.org/repositories/home:agrisv:bareos-21.0/CentOS_7/home:agrisv:bareos-21.0.repo
yum install libdroplet