Coordinator: Bugfix for restart script symlink.

- The symlink (dmtcp_restart_script.sh) should be in the same directory
  as the dmtcp_restart_script_<upid>.sh file.
- It should be a relative link i.e. ./dmtcp_restart_script_<upid>.sh.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2253 ba6dc0ae-232f-0410-883f-9ebac64fc565
Removed some items from TODO.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2254 ba6dc0ae-232f-0410-883f-9ebac64fc565