Updated DMTCP banner.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2731 ba6dc0ae-232f-0410-883f-9ebac64fc565
Copyright headers updated for src/mtcp/*.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2732 ba6dc0ae-232f-0410-883f-9ebac64fc565