Implement jboss.vfs.jvmMemLeakPatch environment variable that can be set to performs otherwise redundant zip stream closures to avoid native zlib memory leak due to buggy usage by JDK (bug_id=6735255)[1].

This could reduce process size with the the trade-off possibly a slightly increased heap usage due to having to perform some bookkeeping of streams - holding on to them longer than otherwise.

[1]http://bugs.sun.com/view_bug.do?bug_id=6735255