When monit is started from inittab instead of script /etc/init.d/monit.sh
it will be respawned after its crash.
Support stopping/starting monit by /etc/init.d/monit.sh
To stop monit, STOP signal is sent to it. By this, init will not respawn monit,
because it is still present in process' list.
Add disabling monit in dot-config by option CONFIG_MONIT_DISABLE.
When monit is disabled by dot-config, monit.sh will sleep forever, to
satisfy init and prevent respawning
Update dot-config items in user-manual.

Include only *.conf instead of all files from /etc/monit.d/.

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>