Add second good go file to tests

Author: owen-mc

go/ql/src/Security/CWE-020/IncompleteHostnameRegexpGood2.go

@@ -6,7 +6,7 @@ import (
 	"regexp"
 )
 
-func checkRedirectGood(req *http.Request, via []*http.Request) error {
+func checkRedirectGood2(req *http.Request, via []*http.Request) error {
 	// GOOD: the host of `req.URL` must be `example.com`, `www.example.com` or `beta.example.com`
 	re := `^((www|beta)\.)?example\.com/`
 	if matched, _ := regexp.MatchString(re, req.URL.Host); matched {

go/ql/test/query-tests/Security/CWE-020/IncompleteHostnameRegexp/IncompleteHostnameRegexpGood2.go

@@ -0,0 +1,16 @@
+package main
+
+import (
+	"errors"
+	"net/http"
+	"regexp"
+)
+
+func checkRedirectGood2(req *http.Request, via []*http.Request) error {
+	// GOOD: the host of `req.URL` must be `example.com`, `www.example.com` or `beta.example.com`
+	re := `^((www|beta)\.)?example\.com/`
+	if matched, _ := regexp.MatchString(re, req.URL.Host); matched {
+		return nil
+	}
+	return errors.New("Invalid redirect")
+}