Reviewed-by: peterz

Reviewed-by: malenkov

Reviewed-by: rupashka

Reviewed-by: rupashka, alexp

Reviewed-by: rupashka, alexp

Reviewed-by: dcherepanov, yan

Reviewed-by: xuelei

6553961: java.util.zip.{CRC32,Adler32}.update(int) doc errors
6646605: Missing method ZipFile.getComment()
6841232: ZipFile should implement Closeable
4985614: Failure on calls to ZipFile constructor
5032358: "java.util.zip.ZipException: The system cannot find the file specified"
6846616: java/util/zip/ZipFile/ReadAfterClose.java failed after fix for 6735255
Summary: some misc bug/rfe fixes for zipfile
Reviewed-by: alanb

Reviewed-by: okutsu

Reviewed-by: jrose

Summary: This problem was discovered testing initial changeset for implementing 6uX Deployment Features into JDK7
Reviewed-by: dgu, billyh

Reviewed-by: chegar

Reviewed-by: michaelm

Summary: check for NPEs
Reviewed-by: chegar

Reviewed-by: mchung

6844313: New I/O: File timestamps should be represented by a FileTime rather than a long+TimeUnit
Reviewed-by: sherman

Reviewed-by: jjg

Reviewed-by: jjg, mcimadamore, darcy
Contributed-by: mernst@cs.washington.edu, mali@csail.mit.edu, mpapi@csail.mit.edu

Summary: Different rounding mode used for float->int conversion
Reviewed-by: malenkov