Merge in DNS/adguard-home from 2509-type-safety-vol2-1 to master
Squashed commit of the following:
commit d58efb32396328247e1bb044f2b01145530cd84c
Author: Eugene Burkov <e.burkov@adguard.com>
Date: Fri Jan 22 14:27:54 2021 +0300
home: imp JSON encoding