Summary: system property sun.zip.disableMemoryMapping to disable mmap use
Reviewed-by: alanb

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

4532049: IllegalArgumentException in ZipInputStream while reading unicode file
5030283: Incorrect implementation of UTF-8 in zip package
4700978: ZipFile can't treat Japanese name in a zipfile properly
4980042: Cannot use Surrogates in zip file metadata like filenames
4820807: java.util.zip.ZipInputStream cannot extract files with Chinese chars in name
Summary: Add new constructors for zip classes to support non-UTF-8 encoded names/comments in ZIP file
Reviewed-by: alanb, martin