Pull request: Migrate to netip.Addr vol.1

Merge in DNS/adguard-home from 2926-lla-v6 to master

Updates #2926.
Updates #5035.

Squashed commit of the following:

commit 2e770d4b6d4e1ec3f7762f2f2466662983bf146c
Merge: 25c1afc5 893358ea
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Fri Oct 14 15:14:56 2022 +0300

    Merge branch 'master' into 2926-lla-v6

commit 25c1afc5f0a5027fafac9dee77618886aefee29c
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Oct 13 18:24:20 2022 +0300

    all: imp code, docs

commit 59549c4f74ee17b10eae542d1f1828d4e59894c9
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Oct 11 18:49:09 2022 +0300

    dhcpd: use netip initially

commit 1af623096b0517d07752385540f2f750f7f5b3bb
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Fri Sep 30 18:03:52 2022 +0300

    all: imp docs, code

commit e9faeb71dbc0e887b25a7f3d5b33a401805f2ae7
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Sep 29 14:56:37 2022 +0300

    all: use netip for web

commit 38305e555a6884c3bd1b0839330b942ce0e59093
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Sep 28 19:13:58 2022 +0300

    add basic lla

internal/home/clients_test.go

@@ -2,6 +2,7 @@ package home
 
 import (
 	"net"
+	"net/netip"
 	"os"
 	"runtime"
 	"testing"
@@ -287,10 +288,10 @@ func TestClientsAddExisting(t *testing.T) {
 			DBFilePath: "leases.db",
 			Conf4: dhcpd.V4ServerConf{
 				Enabled:    true,
-				GatewayIP:  net.IP{1, 2, 3, 1},
-				SubnetMask: net.IP{255, 255, 255, 0},
-				RangeStart: net.IP{1, 2, 3, 2},
-				RangeEnd:   net.IP{1, 2, 3, 10},
+				GatewayIP:  netip.MustParseAddr("1.2.3.1"),
+				SubnetMask: netip.MustParseAddr("255.255.255.0"),
+				RangeStart: netip.MustParseAddr("1.2.3.2"),
+				RangeEnd:   netip.MustParseAddr("1.2.3.10"),
 			},
 		}