*: pass golangci-lint

.golangci.yaml

@@ -6,6 +6,10 @@ output:
 linters-settings:
   goimports:
     local-prefixes: "github.com/chihaya/chihaya"
+  staticcheck:
+    checks:
+      - "all"
+      - "-SA1019"  # Allow netErr.Temporary
   gosec:
     excludes:
       - "G404"  # Allow the usage of math/rand

frontend/udp/frontend_test.go

@@ -21,8 +21,7 @@ func TestStartStopRaceIssue437(t *testing.T) {
 		t.Fatal(err)
 	}
 	errC := fe.Stop()
-	errs := <-errC
+	if errs := <-errC; len(errs) != 0 {
-	if len(errs) != 0 {
 		t.Fatal(errs[0])
 	}
 }