internal: add Wunderlist to list of broken auth providers

Fixes golang/go#14439

Change-Id: I6b72562d5d49d4c847390438dee11ce41bf46918
Reviewed-on: https://go-review.googlesource.com/19784
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/internal/token.go b/internal/token.go
index 526d224..9006448 100644
--- a/internal/token.go
+++ b/internal/token.go
@@ -114,6 +114,7 @@
 	"https://www.googleapis.com/",
 	"https://www.linkedin.com/",
 	"https://www.strava.com/oauth/",
+	"https://www.wunderlist.com/oauth/",
 }
 
 func RegisterBrokenAuthHeaderProvider(tokenURL string) {