Pull request: 2956 fix clients disabling

Merge in DNS/adguard-home from 2956-fix-flag to master

Closes #2956.
Updates #1947.

Squashed commit of the following:

commit ffb98f752f6d4c40ea166ff1e482edcd7f028513
Merge: 800d67db 7be2fc37
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Wed Apr 14 19:01:34 2021 +0300

    Merge branch 'master' into 2956-fix-flag

commit 800d67db84786c8fe93d38b6aa932aa4dd4dd345
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Wed Apr 14 18:54:26 2021 +0300

    home: fix clients disabling

internal/home/clients.go

@@ -117,9 +117,7 @@ func (clients *clientsContainer) Init(
 	}
 
 	clients.dhcpServer = dhcpServer
-	if etcHosts != nil {
-		clients.etcHosts = etcHosts
-	}
+	clients.etcHosts = etcHosts
 	clients.addFromConfig(objects)
 
 	if !clients.testing {

internal/home/home.go

@@ -201,8 +201,8 @@ func setupConfig(args options) {
 	if !args.noEtcHosts {
 		Context.etcHosts = &aghnet.EtcHostsContainer{}
 		Context.etcHosts.Init("")
-		Context.clients.Init(config.Clients, Context.dhcpServer, Context.etcHosts)
 	}
+	Context.clients.Init(config.Clients, Context.dhcpServer, Context.etcHosts)
 	config.Clients = nil
 
 	if (runtime.GOOS == "linux" || runtime.GOOS == "darwin") &&