Merge in DNS/adguard-home from 2234-move-to-internal to master
Squashed commit of the following:
commit d26a288cabeac86f9483fab307677b1027c78524
Author: Eugene Burkov <e.burkov@adguard.com>
Date: Fri Oct 30 12:44:18 2020 +0300
* all: move internal Go packages to internal/
Closes#2234.
Close#2040
* commit '06af130bb7c042d8a44720cc9423b3fc76deadee':
- DHCP: fix crash after adding static lease which replaces the dynamic one
* DHCP: don't replace the host name from static lease
When a static lease contains a host name
and client sends its own host name:
1. don't replace the host name from static lease with it
2. send option FQDN to the client in Ack response packet