tm 1.22, made on 2008-01-30

Quirks:

1. In HPUX, the usual, except that all timevals are legal and
   wrap back around to 1901 and then back to the base date.
2. DOS version can't handle dates prior to 1980, but afterwards
   timeval is treated as unsigned, running until 2106.
3. First Linux version is 1.22; behaves like the HPUX version.

usage: tm [options] [args]
   -h -? ?              help
   -n                   show info for current time
   -d yyyymmddhhmmss    show info for this local date/time
   -t n                 show info for this timeval
   -T                   show time table for this version
   -D                   show debug info