This version of readclock can replace the version located in
/usr/src/commands/ibm.  If linked to setclock and will set the realtime clock
of the PC to the minix time.

If you run your realtime clock on UTC/GMT time then to set the realtime clock
to that of the current minix time you run setclock with the -u option.
Otherwise you must have TZ set to the same time that the realtime clock gives
and run setclock without any parameters.
