README at [5eff930a35]

File README as of check-in [5eff930a35]


Tested platforms:
  Mac OS X 10.1
  HP-UX 11.11
  NetBSD 1.6.1
  FreeBSD 4.8
  OpenBSD 3.4
  SunOS 5.9
  Linux (Slackware, RedHat, Fedora Core, Debian)
  IRIX 6.5