Pull request: all: fix lint and naming issues vol. 4

Merge in DNS/adguard-home from 2276-fix-lint-4 to master

Updates #2276.

Squashed commit of the following:

commit 15d49184cd8ce1f8701bf3221e69418ca1778b36
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Tue Dec 8 15:51:34 2020 +0300

    util: fix naming

commit 3b9a86a0feb8c6e0b167e6e23105e8137b0dda76
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Tue Dec 8 15:41:10 2020 +0300

    all: fix lint and naming issues vol. 4

internal/util/helpers.go

@@ -9,7 +9,6 @@ import (
 	"io/ioutil"
 	"os"
 	"os/exec"
-	"path"
 	"runtime"
 	"strings"
 )
@@ -41,13 +40,6 @@ func RunCommand(command string, arguments ...string) (int, string, error) {
 	return cmd.ProcessState.ExitCode(), string(out), nil
 }
 
-func FuncName() string {
-	pc := make([]uintptr, 10) // at least 1 entry needed
-	runtime.Callers(2, pc)
-	f := runtime.FuncForPC(pc[0])
-	return path.Base(f.Name())
-}
-
 // SplitNext - split string by a byte and return the first chunk
 // Skip empty chunks
 // Whitespace is trimmed

internal/util/network_test.go

@@ -1,7 +1,6 @@
 package util
 
 import (
-	"log"
 	"testing"
 )
 
@@ -19,6 +18,6 @@ func TestGetValidNetInterfacesForWeb(t *testing.T) {
 			t.Fatalf("No addresses found for %s", iface.Name)
 		}
 
-		log.Printf("%v", iface)
+		t.Logf("%v", iface)
 	}
 }