This is a fix for bug #6841 (https://gna.org/bugs/?func=detailitem&item_id=6841) which was reported
by Daniel Perez in the post at https://mail.gna.org/public/relax-users/2006-09/msg00000.html
(Message-id: <44F7FFCF.4060102@...>). The 'spawnlp' function problem was identified by
Chris MacRaild at https://mail.gna.org/public/relax-users/2006-09/msg00003.html (Message-id:
<1157109851.28764.964.camel@...>).
This import statement fails under MS Windows as the 'spawnlp' function is UNIX only.
