- Add plugin support back (off by default). 
- Add PHP sockets module in depends for ping works. 
PR: ports/110649 , ports/110500 
Submitted by: Timur I. Bakeyev <email@example.com> , edwin 
- Saving config.php was a bad idea. cacti's developers make cahnges in it.
I've moved DB settings from config.php to db-settings.php and save it
Reported by: Zoltan Frombach <firstname.lastname@example.org>,
Andrej Zverev <email@example.com>