Bug#53940: module configuration needs to be smarter
Dbootstrap needs to be smarter about installing modules. It should only
install modules selected by the user during the modconf stage. If no
modules are selected, then the dependency on drivers.tgz should be
bypassed. In this case, the user should not be prompted for the drivers
disk(s). Subsequent use of modconf should prompt for the drivers.tgz
disk(s) on a variety of medium in similar fasion as dbootstrap.