Update the server to provide an idle time limit configuration option that can
be used to terminate client connections that have been idle for too long.  This
can be controlled on a server-wide default level using the
ds-cfg-idle-time-limit configuration attribute in the cn=config entry, but it
can also be overridden on a per-user level with the ds-rlim-idle-time-limit
operational attribute in the user's entry.

Note that while the idle time limit support is server wide, it needs help from
the connection handler to provide an idle time for client connections.  At this
time, only the LDAP connection handler provides this capability.  It is not
appropriate for internal connections, and it is not seen as important for JMX
connections at this time (although such support could be added in the future if
the need arises).

OpenDS Issue Number:  118