Please review the code change at http://cr.openjdk.java.net/~weijun/8168127/webrev.00/
Two changes: 1. npath2 is considered in equals and hashCode of FilePermission, so 2 objects with different npath2 can be added to a map and different entries. 2. special name for newPermUsingAltPath and newPermPlusAltPath results, so FilePermissionCollection::add will not merge one with the original. Thanks Max
