Any administrative operation, performed using maxadmin or maxctrl,
that takes longer than the watchdog timeout will cause MaxScale to
be killed and restarted by the watchdog.
Added a section about unknown global parameters being treated as errors to
both documents and fixed the passwd deprecation description in the
upgrading document.
Separated mmmon and ndbclustermon from the list of supported modules into
their own legacy section. Added a warning about the deprecation to the
relevant documents.
Also added the csmon link to the documentation contents.
