Add cache stats to cat/nodes.

Closes #4543.
Do not start packages on installation

The reason to not start packages on installation is to allow to configure
them before starting up (setting heap, cluster.name etc)

Also the documentation was updated in order to show, which statements need
to be executed.
In addition, these statements are also printed out when the package is
installed, depending on whether chkconfig, system or update-rc.d is used.

Closes #3722