8231795: Enhance datagram socket support
Reviewed-by: rriggs, prappo, bpb

Summary: updated files with 2011, 2012 and 2013 years according to the file's last updated date
Reviewed-by: tbell, lancea, chegar

Reviewed-by: chegar

Reviewed-by: chegar, ksrini

7132889: (se) AbstractSelectableChannel.register and configureBlocking not safe from asynchronous close
Reviewed-by: alanb
Contributed-by: NShirish Kuncolienkar <shirishk@linux.vnet.ibm.com>

Reviewed-by: darcy, weijun

Summary: Update copyright for files that have been modified starting July 2008 to Dec 2008
Reviewed-by: katleman, ohair, tbell

Summary: update the spec and implementation to throw ClosedSelectorException
Reviewed-by: alanb