Pull request: home: imp init

Merge in DNS/adguard-home from fix-init to master

Squashed commit of the following:

commit 551c143f6c3846f061b3118a06e1c756bc3e2ba1
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Mon Feb 15 13:45:06 2021 +0300

    home: imp init

CHANGELOG.md

@@ -28,6 +28,7 @@ and this project adheres to
 
 ### Fixed
 
+- Occasional crashes during startup.
 - The field `"range_start"` in the `GET /control/dhcp/status` HTTP API response
   is now correctly named again ([#2678]).
 - DHCPv6 server's `ra_slaac_only` and `ra_allow_slaac` settings aren't reset to

internal/home/home.go

@@ -304,6 +304,11 @@ func run(args options) {
 		log.Fatalf("Can't initialize Web module")
 	}
 
+	Context.ipDetector, err = newIPDetector()
+	if err != nil {
+		log.Fatal(err)
+	}
+
 	if !Context.firstRun {
 		err := initDNSServer()
 		if err != nil {
@@ -324,11 +329,6 @@ func run(args options) {
 		}
 	}
 
-	Context.ipDetector, err = newIPDetector()
-	if err != nil {
-		log.Fatal(err)
-	}
-
 	Context.web.Start()
 
 	// wait indefinitely for other go-routines to complete their job