Improve SDURLCache behavior drastically.

diff --git a/SDURLCache b/SDURLCache
index 234a1d60a257fe502a1228a74c40b9deebe2d920..77db3cfe36684d83e47cebc65caf843789a604b8 160000 (submodule)
--- a/SDURLCache
+++ b/SDURLCache
@@ -1 +1 @@
-Subproject commit 234a1d60a257fe502a1228a74c40b9deebe2d920
+Subproject commit 77db3cfe36684d83e47cebc65caf843789a604b8