recordev.icn: Program to record events

This program records events in a file.  Event information is stored
by using image(), so some information may be lost.

This program is called as

     recordev <options> tp args

The options supported are:

     -o s    write event history to the file named s; default standard
                output.

     -c s    prefix the event history with a comment event whose value
                is s.

Warning:  If -o is not given and tp also writes to standard output,
the event history file will be corrupted.

If args contains options, use -- to prevent recordev from consuming them,
as in

     recordev -o history -- tp args