Reviewed-by: darcy, lancea, alanb, briangoetz, mduigou, mchung

6709457: (fc) lock/tryLock() throws IOException "Access is denied" when file opened for append [win]
Reviewed-by: chegar

Summary: Do exit status handling before trying to close streams
Reviewed-by: alanb, dholmes

Summary: Add missing doPrivileged to UNIXProcess.java.linux
Reviewed-by: alanb

Summary: Use Null{In,Out}putStream.INSTANCE as with Linux code
Reviewed-by: ohair

Summary: use thread pool for reaper thread; move most I/O operations out of reaper thread
Reviewed-by: michaelm, hiroshi

Reviewed-by: darcy, weijun

Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell

Reviewed-by: alanb, iris