POSTIN
/bin/sh
update-alternatives --install /usr/lib/ssh/ssh-askpass ssh-askpass /usr/lib/ssh/qt4-ssh-askpass 50 update-alternatives --install /usr/bin/ssh-askpass bssh-askpass /usr/lib/ssh/qt4-ssh-askpass 50
POSTUN
/bin/sh
[ $1 = 0 ] || exit 0 update-alternatives --remove ssh-askpass /usr/lib/ssh/qt4-ssh-askpass update-alternatives --remove bssh-askpass /usr/lib/ssh/qt4-ssh-askpass