[epiphany] ADD TODO note about misuse of g_str_equal

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 3e51e87a8a49957a51819664fbec6d294f1154aa
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sun Sep 11 15:13:59 2016 -0500

    ADD TODO note about misuse of g_str_equal

 TODO |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/TODO b/TODO
index 35f8267..4fde6fe 100644
--- a/TODO
+++ b/TODO
@@ -15,3 +15,4 @@ Some TODO items, in no particular order:
 - We practically don't test any part of Epiphany, change that (how do
   you test UI code? There's like 3 or 4 frameworks for this, pick one?
   What does Chrome do?)
+- g_str_equal -> g_strcmp0 or strcmp except in hash maps