Coord: fflush port-file before closing.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2476 ba6dc0ae-232f-0410-883f-9ebac64fc565
Bugfix for SharedData::updateHostAndPort.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2477 ba6dc0ae-232f-0410-883f-9ebac64fc565
Another bugfix for SharedData::updateHostAndPortEnv().

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2478 ba6dc0ae-232f-0410-883f-9ebac64fc565
Bugfix for 2478.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2479 ba6dc0ae-232f-0410-883f-9ebac64fc565
MTCP reorganized.
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