Pull request: * all: move internal Go packages to internal/

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.

internal/home/whois_test.go

@@ -0,0 +1,28 @@
+package home
+
+import (
+	"testing"
+
+	"github.com/AdguardTeam/AdGuardHome/internal/dnsforward"
+	"github.com/stretchr/testify/assert"
+)
+
+func prepareTestDNSServer() error {
+	config.DNS.Port = 1234
+	Context.dnsServer = dnsforward.NewServer(dnsforward.DNSCreateParams{})
+	conf := &dnsforward.ServerConfig{}
+	conf.UpstreamDNS = []string{"8.8.8.8"}
+	return Context.dnsServer.Prepare(conf)
+}
+
+func TestWhois(t *testing.T) {
+	assert.Nil(t, prepareTestDNSServer())
+
+	w := Whois{timeoutMsec: 5000}
+	resp, err := w.queryAll("8.8.8.8")
+	assert.Nil(t, err)
+	m := whoisParse(resp)
+	assert.Equal(t, "Google LLC", m["orgname"])
+	assert.Equal(t, "US", m["country"])
+	assert.Equal(t, "Mountain View", m["city"])
+}