Pull request: upd-go

Merge in DNS/adguard-home from upd-go to master

Squashed commit of the following:

commit 8edfb5cc3466c1e4ee2eacae5157bd93c135a284
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Wed Aug 3 14:25:45 2022 +0300

    all: imp docs; fmt

commit 080b8a85c02afbdaa079c0da47cb7b6311d50fbe
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Tue Aug 2 20:51:20 2022 +0300

    all: upd go, imp generic code

internal/dhcpd/v4_test.go

@@ -12,7 +12,7 @@ import (
 	"github.com/AdguardTeam/golibs/stringutil"
 	"github.com/AdguardTeam/golibs/testutil"
 	"github.com/insomniacslk/dhcp/dhcpv4"
-	"github.com/mdlayher/raw"
+	"github.com/mdlayher/packet"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -554,7 +554,7 @@ func TestV4Server_Send(t *testing.T) {
 		req:  &dhcpv4.DHCPv4{ClientHWAddr: knownMAC},
 		resp: &dhcpv4.DHCPv4{YourIPAddr: knownIP},
 		want: &dhcpUnicastAddr{
-			Addr:   raw.Addr{HardwareAddr: knownMAC},
+			Addr:   packet.Addr{HardwareAddr: knownMAC},
 			yiaddr: knownIP,
 		},
 	}, {