mandos-client.postinst uses dpkg-architecture to compute a multiarch
path. The result of such a computation at runtime will likely produce a
wrong result if the package is installed for a foreign architecture. It
is best practice to compute and interpolate the multiarch tuple at
package build time. For this purpose, dh_installdeb substituted
#DEB_HOST_MULTIARCH#. While at it, I also observe that the postinst does
not contain #DEBHELPER# and thereby strips any debhelper-generated
maintainer snippets. Is that intentional?
Helmut