Title: #107: WATCHDOG: Avoid non async-signal-safe from the signal_handler
well you could have a globalk variable for the watchdog and change it from a custom signal
handler, but the point of the watchdog is to go thorugh the tevent handler instead so that
we are sure the machinery is working and not stuck somwhere.
Resetting directly from the singal handler would bypass all processing and therefore
render the watchdog useless I guess.
See the full comment at https://github.com/SSSD/sssd/pull/107#issuecomment-266460639