Add XSRF and XSS as common initialisms.
diff --git a/lint.go b/lint.go
index 275eb0e..2495099 100644
--- a/lint.go
+++ b/lint.go
@@ -724,6 +724,8 @@
 	"UTF8":  true,
 	"VM":    true,
 	"XML":   true,
+	"XSRF":  true,
+	"XSS":   true,
 }
 
 // lintTypeDoc examines the doc comment on a type.