Log Message:
Update to 2.1:

* Fri Jan 14 2005 Eric S. Raymond <esr@snark.thyrsus.com> - 2.1-1
- Interrupt handlers are refactored so manlifter can be aborted with
  a single ^C; as a result, exit values 4 and 5 have swapped places.
  In manlifter, don't remove the result file unless we're in batchmode.
  Lifts 96% of 11121 pages in a full Fedora Core 3 install.