Comment 3 for bug 1559185

seems like it needs small changes in src/gs-application.c gs_application_open() adding a case

  } else if (g_strcmp0 (soup_uri_get_scheme (uri), "apt") == 0) {

the sementic is a bit different afaik though, we refer to a binary name and the appstream case to a .desktop. It's not a 1<->1 mapping though since a binary can have several .desktop ... the best we can probably do there is to pick the first .desktop containing in the binary, if we have that info available somehow?