7846: limit fnmatch pattern cache to _MAXCACHE=100 entries.

Patch by Andrew Clegg.
diff --git a/Misc/ACKS b/Misc/ACKS
index ec42bf9..023890d 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -146,6 +146,7 @@
 David Cinege
 Mike Clarkson
 Brad Clements
+Andrew Clegg
 Steve Clift
 Nick Coghlan
 Josh Cogliati