[SSSD] [PATCH] tools_util.h provides signal_sssd function.

[Michal Židek]

I was looking for some reusable code and found static function
send_sighup in sss_debuglevel.c. This function can be useful in
other tools as well, so I renamed it to signal_sssd, added
signum parameter and put it to tools_util.c/h. It can be used
to send any signal to sssd monitor.

Patch is in attachment.

Thanks
Michal