Changes:

- depmod has an internal nm so that it will work even if the /usr partition
  isn't mounted yet.

- A new option: "keep" can be used in the configuration file.  If such a
  line is put _before_ any lines with path[]-directives, the built-in
  default paths will be preserved, and any new path will be _added_ to that set.

- depmod can now also be used: "depmod -a 1.3.72".  In this case the
  modules under /lib/modules/1.3.72 will be used to create the modules.dep
  file. The dependency file will also be put in /lib/modules/1.3.72
  (This makes it possible, more or less, to do the depmod -a _before_
  rebooting a new kernel).
