cyrus-imapd from home:buschmann23:cyrus:3.0 project

需要 15.6 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/home:buschmann23:cyrus:3.0/15.6/home:buschmann23:cyrus:3.0.repo
zypper refresh
zypper install cyrus-imapd