Pull request: upd-dnsproxy

Squashed commit of the following:

commit 463811748fa5a1f52e084c782e94f268b00b3abc
Merge: 3de62244e 130560b10
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Wed Jul 10 15:06:01 2024 +0300

    Merge remote-tracking branch 'origin/master' into upd-dnsproxy

commit 3de62244ee10fce9fb97c73c2955479883ce34eb
Merge: e2de50bf9 e269260fb
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Wed Jul 10 09:13:40 2024 +0300

    Merge remote-tracking branch 'origin/master' into upd-dnsproxy

commit e2de50bf9cf4eddaa0d87c20c8c1605bf4630fce
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Wed Jul 10 09:11:25 2024 +0300

    home: todos

commit 58fe497eec
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue Jul 9 13:29:19 2024 +0300

    home: imp code

commit 4db7cdc0c4
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue Jul 9 11:31:12 2024 +0300

    all: imp code

commit 7e8d3b50e7
Merge: 559c3b79d 9a6dd0dc5
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon Jul 8 10:56:14 2024 +0300

    Merge remote-tracking branch 'origin/master' into upd-dnsproxy

commit 559c3b79d7
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon Jul 8 10:54:03 2024 +0300

    dnsforward: imp code

commit ba4a7e1c70
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon Jul 8 10:49:46 2024 +0300

    aghos: imp code

commit cdf9ccd371
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Fri Jul 5 16:19:27 2024 +0300

    all: partial revert slog logger usage

commit f16cddbb8c
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Fri Jul 5 13:01:37 2024 +0300

    all: upd dnsproxy

commit 5932c8d102
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Fri Jul 5 11:49:37 2024 +0300

    dnsforward: slog logger

commit 3d7f734ac9
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Fri Jul 5 11:05:14 2024 +0300

    all: slog logger

commit 9a74d5d98b
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Thu Jul 4 12:16:21 2024 +0300

    all: upd dnsproxy

commit 537bdacec8
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Thu Jul 4 12:10:30 2024 +0300

    all: upd dnsproxy

commit 38e10dee48
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Thu Jul 4 10:37:50 2024 +0300

    dnsforward: upstream mode

internal/home/dns.go

@@ -2,6 +2,7 @@ package home
 
 import (
 	"fmt"
+	"log/slog"
 	"net"
 	"net/netip"
 	"net/url"
@@ -43,8 +44,8 @@ func onConfigModified() {
 
 // initDNS updates all the fields of the [Context] needed to initialize the DNS
 // server and initializes it at last.  It also must not be called unless
-// [config] and [Context] are initialized.
-func initDNS() (err error) {
+// [config] and [Context] are initialized.  l must not be nil.
+func initDNS(l *slog.Logger) (err error) {
 	anonymizer := config.anonymizer()
 
 	statsDir, querylogDir, err := checkStatsAndQuerylogDirs(&Context, config)
@@ -113,13 +114,16 @@ func initDNS() (err error) {
 		anonymizer,
 		httpRegister,
 		tlsConf,
+		l,
 	)
 }
 
 // initDNSServer initializes the [context.dnsServer].  To only use the internal
-// proxy, none of the arguments are required, but tlsConf still must not be nil,
-// in other cases all the arguments also must not be nil.  It also must not be
-// called unless [config] and [Context] are initialized.
+// proxy, none of the arguments are required, but tlsConf and l still must not
+// be nil, in other cases all the arguments also must not be nil.  It also must
+// not be called unless [config] and [Context] are initialized.
+//
+// TODO(e.burkov): Use [dnsforward.DNSCreateParams] as a parameter.
 func initDNSServer(
 	filters *filtering.DNSFilter,
 	sts stats.Interface,
@@ -128,8 +132,10 @@ func initDNSServer(
 	anonymizer *aghnet.IPMut,
 	httpReg aghhttp.RegisterFunc,
 	tlsConf *tlsConfigSettings,
+	l *slog.Logger,
 ) (err error) {
 	Context.dnsServer, err = dnsforward.NewServer(dnsforward.DNSCreateParams{
+		Logger:      l,
 		DNSFilter:   filters,
 		Stats:       sts,
 		QueryLog:    qlog,