Pull request: all: allow local non-top-level domains

Updates #2961.

Squashed commit of the following:

commit 207eeb85caf6caee81a669302daf4e10a5b61585
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Thu Apr 15 18:48:50 2021 +0300

    all: allow local non-top-level domains

internal/home/dns.go

@@ -67,7 +67,7 @@ func initDNSServer() error {
 		Stats:          Context.stats,
 		QueryLog:       Context.queryLog,
 		SubnetDetector: Context.subnetDetector,
-		AutohostTLD:    config.DNS.AutohostTLD,
+		LocalDomain:    config.DNS.LocalDomainName,
 	}
 	if Context.dhcpServer != nil {
 		p.DHCPServer = Context.dhcpServer