Version 1.3.1
  - Fixed problem with -s and -e options which would not function during
    daylight savings time (We don't have the cursed daylight savings time in
    Indiana, so it took a while before I realized there really was a
    problem).
  - Small insignificant code changes.

Version 1.3
  - Added -f option to perform ftp login accounting in addition to normal
    login accounting.
  - Added -F option to perform ftp login accounting only.
  - Added some example scripts.
  - Fixed speeling misteaks.
  - Fixed error where clipping could in certain cases incorrectly report the
    correct amount of clipped login time while the user was stilled logged in.
  - Added -m option to show minimum and maximum concurrent logins.
  - Made sac read from stdin if "-" given as filename to -w option.
  - Added -H host-list to perform accounting on logins from specific hosts.
  - Made sac utmp size independent, for huge utmp sizes. (256 bytes for a
    host-name?  That's gonna make wtmp HUGE! 6x as large as it is now! I
    already have a wtmp that grows 30MB in a month! Must be a Posix thing.)
  - _Finally_ made sac properly handle -s and -e options with per user
    accounting.  STOP BOTHERING ME ABOUT IT ALREADY! =)

Version 1.2
  - Added -o option to handle old or broken wtmp's not created by linux
    itself, such as those created by the tacacs terminal server.
  - Added -t option to handle some ancient format that tacacs apparently
    uses.
  - Added -b for producing a determination of how much login time has
    precisely been used over the last few hours.  Useful for determining
    if someone has been logged in say the last 4 hours: sac -bp 4 bubba
  - Added -c option to perform login clipping, thus only show how much login
    is really being used by counting multiple logins as only one login.
  - Handles xterms that work (sorta) by logging login and logout as a user
    process and dead process respectfully.
  - Added --help option to print a verbose usage listing.
  - Added -x user-list for excluding certain users from accounting.
  - Added -u user-list which is the default.
  - Added -T tty-list to perform accounting on only certain ttys.
  - Added --help, -s, -e, -b, and -t options to rawtmp.

Version 1.1
  - Added the -s and -e options for starting and ending dates.
  - Handles time changes that netdate logs in wtmp file (I think).
  - Fixed, err, made more robust, some possible divide by zero errors.
  - Throws out null wtmp entries (where do these come from?)
  - Corrected(?) argument parsing.
  - Added rawtmp command.

Version 1.0
  - The original, perfect as it was.
