Aj and I were talking about this, and here's an alternative: * Make a new suidmanager package that predepends on the new line of dpkg packages and, in its preinst, converts everything to use statoverride. * Dpkg doesn't need any support for suidmanager conversion stuff at all. * Any package that once used suidmanager and is updated to no longer use it, needs to conflict with old version of suidmanager, since installing it on an older system with the old suidmanager will cause it to trample over the permissions the user has set.
There's still the problem of how I get packages that call dh_suidregister to have a versioned conflicts, but I guess that's my problem, not your problem. :-) -- see shy jo