Bugfix for Filesystem::resolveSymLink().

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2470 ba6dc0ae-232f-0410-883f-9ebac64fc565
PID: reset virtual-pid env after fork.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2471 ba6dc0ae-232f-0410-883f-9ebac64fc565
Suppress useless JNOTE abt ckpt-interval.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2472 ba6dc0ae-232f-0410-883f-9ebac64fc565
Coordinator API reorganized.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2473 ba6dc0ae-232f-0410-883f-9ebac64fc565