Enhanced nexecd to execute /bin/echo.
Enhanced nexecd to execute /bin/echo.

This nexecd has some problems.

1. This version does not receive command line arguments from nexec. This
nexecd executes "/bin/echo foo" always.
2. This nexecd does not write any pid files.
3. Too slow to show "foo".

SumiTomohiko/nexec,SumiTomohiko/nexec,SumiTomohiko/nexec