prune util/log and user logger (#1237)

* prune util/log and user logger

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

* plaintext logger

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

* add newline

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

api/server/acme/certmagic/certmagic_test.go

@@ -1,6 +1,7 @@
 package certmagic
 
 import (
+	"net"
 	"net/http"
 	"os"
 	"reflect"
@@ -21,6 +22,9 @@ func TestCertMagic(t *testing.T) {
 	}
 	l, err := NewProvider().Listen()
 	if err != nil {
+		if _, ok := err.(*net.OpError); ok {
+			t.Skip("Run under non privileged user")
+		}
 		t.Fatal(err.Error())
 	}
 	l.Close()