kshowmail from KDE:KDE3 project

需要 openSUSE Tumbleweed ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/KDE:KDE3/openSUSE_Tumbleweed/KDE:KDE3.repo
zypper refresh
zypper install kshowmail

需要 openSUSE Leap 15.2 ARM ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/KDE:KDE3/openSUSE_Leap_15.2_ARM/KDE:KDE3.repo
zypper refresh
zypper install kshowmail

需要 openSUSE Leap 15.1 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/KDE:KDE3/openSUSE_Leap_15.1/KDE:KDE3.repo
zypper refresh
zypper install kshowmail

需要 15.6 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/KDE:KDE3/15.6/KDE:KDE3.repo
zypper refresh
zypper install kshowmail

需要 15.5 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/KDE:KDE3/15.5/KDE:KDE3.repo
zypper refresh
zypper install kshowmail

需要 15.4 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/KDE:KDE3/15.4/KDE:KDE3.repo
zypper refresh
zypper install kshowmail