-- The program should fork into the background instead of having to use the shells job control.
-- Should probably use a select statement on the inner loop for cleaner control.
-- The regex that matches lines in the @files array should be easily user configurable.
-- .sigcancel file should hold comments.
-- $update_time variable should be able to handle strings like 1d for 1 day and so on.
-- Should make it easier to configure the format of the output.
-- Should be able to detect if another process of randomsig is already running and kill it off.
-- Config file?  .randomsigrc ?
