Another batch of ZipFile hackery. I think I finally understand how weak references and finalizers interact. We could eliminate the Inflater cache entirely, but this proposal keeps a one-element Inflater cache.
http://cr.openjdk.java.net/~martin/webrevs/openjdk9/ZipFile-Inflater-cache/ https://bugs.openjdk.java.net/browse/JDK-8156484 - fixes the memory bloat from cached Inflaters - removes small races in close - various other minor improvements
