When installing collectd is usually automatically started. If it is
already running, the start operation has no effects. Therfore, to make
any configuration setting effective it has to be instead restarted
(stop + start).
Collectd log file is stored by logfile plugin to stack log folder.
The actual location of this file can be configured.
Verbosity of plugin can be increased to make debug messages visible
when running inside a collectd release compiled without deubgging
support. This option is mainly useful for plugin developers.
Related-Bug: #1606338
Change-Id: I658c1c3837970f3732ea64acd791838ee54c61ac
7bcd8a9e01