Err, TERM=linux also causes errors when tests are run via cron.
Reset TERM=dummy.
Workaround is to do a CRON=running from within the cron job and only set
TERM=dummy when not run via cron.
`_known_hosts_real' will add hosts from HOSTFILE (compgen -A hostname), unless
`COMP_KNOWN_HOSTS_WITH_HOSTFILE' is set to an empty value.
To run the unit tests:
$ cd test && ./runUnit _known_hosts_real.exp