Updates #2582. Squashed commit of the following: commit 456bbafa5a7e84e30d5a5c0ee58f5bacebb2b003 Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Fri Mar 12 13:23:32 2021 +0300 dhcpd: imp more commit 69258ed0d36e59f6be3c31250ea6fd37a1e4cb53 Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Fri Mar 12 13:01:18 2021 +0300 dhcpd: actually use hostname method