Fix vet errors.

caddy/setup/rewrite_test.go

@@ -135,7 +135,7 @@ func TestRewriteParse(t *testing.T) {
 			to	/to
 			if {path} is a
 		 }`, false, []rewrite.Rule{
-			&rewrite.ComplexRule{Base: "/", To: "/to", Ifs: []rewrite.If{rewrite.If{"{path}", "is", "a"}}},
+			&rewrite.ComplexRule{Base: "/", To: "/to", Ifs: []rewrite.If{rewrite.If{A: "{path}", Operator: "is", B: "a"}}},
 		}},
 	}
 

middleware/rewrite/condition_test.go

@@ -55,7 +55,7 @@ func TestConditions(t *testing.T) {
 	for _, op := range invalidOperators {
 		_, err := NewIf("a", op, "b")
 		if err == nil {
-			t.Error("Invalid operator %v used, expected error.", op)
+			t.Errorf("Invalid operator %v used, expected error.", op)
 		}
 	}