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/dnsforward/http_test.go

@@ -34,7 +34,7 @@ func (fsr *fakeSystemResolvers) Get() (rs []string) {
 	return nil
 }
 
-func loadTestData(t *testing.T, casesFileName string, cases interface{}) {
+func loadTestData(t *testing.T, casesFileName string, cases any) {
 	t.Helper()
 
 	var f *os.File