Since 2.1.71:

  - Handling of local symbols revamped, so that ld -r objects work
    properly when they have "conflicting" symbols.
  - Modules may have .*.init sections which are freed after init_module
    runs.  Note that the module must have _very_ large initial data for
    this to have any effect at all.  Modules with large firmware blocks
    to download are good candidates though.
  - Aliases are now matched through globbing (for devfs), and 
    aliases of aliases resolve properly.

Since 2.1.55:

  - Build process now uses an autoconf-generated configure script.
  - New program modinfo to display information embedded in the object
    files of 2.1.x-style modules (by Tom Dyas, still in development).
  - Recognize quoted parameter strings for 2.0.x modules.
  - Kerneld zombie bug fixed.

