command tests if there are files hosed in the user's sendfile spool
area. If so he will be informed about the files.
This command should be started from /etc/profile to give all users a
chance to notices that some files have arrived in their absence. As
the defauld behaviour of sendfiled is to write a note on the user's
tty he won't notice receiption if he's not logged in. The lack of
need to be logged in is one of