nsscache: add comment

diff --git a/group.go b/group.go
index 7cc084187d15f613d140f251eef5cfdfea0d4751..b7f7d1b8e8b9c4ce71252570c5d9cc6182b972d9 100644 (file)
--- a/group.go
+++ b/group.go
@@ -39,6 +39,8 @@ type Group struct {
        Gid     uint64
        Members []string
 }
+
+// Go does not support slices in map keys; therefore, use this separate struct
 type GroupKey struct {
        Name    string
        Passwd  string