Fixes since v1.8.1.5
--------------------
+ * An earlier change to the attribute system introduced at v1.8.1.2 by
+ mistake stopped a pattern "dir" (without trailing slash) from
+ matching a directory "dir" (it only wanted to allow pattern "dir/"
+ to also match).
+
* The code to keep track of what directory names are known to Git on
platforms with case insensitive filesystems can get confused upon a
hash collision between these pathnames and looped forever.