Remove /dev/console from the jail /dev environment. It's probably not
strictly a security hole, but neither is it a very good idea. Replace
it with a symlink to /dev/null to happify programs that expect it.

It is suggested that users of the jail environment modify the jail's
syslog.conf to not send stuff to /dev/console, but instead syslog
it somewhere else. Such as a loghost, potentially even to the host
environment's syslog.

Approved by: jkh