If <tt>savecontinuecnfreq</tt> > 0, then the atomic configuration will be saved
in a .cn file specified by <tt>continuecnfile</tt> every <tt>savecontinuecnfreq</tt>
steps during MD simulation (<tt>run</tt>).

<p>
Unlike <tt>intercnfile</tt>, the file name specified by <tt>continuecnfile</tt> does
not automatically increase.  This means that a new <tt>continuecnfile</tt> will overwrite
the old file (unless the file name <tt>continuecnfile</tt> is changed intentionally).
This allows the hard disk to always hold a copy of the latest configuration
for restarting purposes, without requiring a huge disk space.  If you want to record
the configurations during MD simulations all in different files, use <tt>savecnfreq</tt>
instead.

<p>
Also see <tt>readcontinuecn</tt>, <tt>continuecnfile</tt>, <tt>intercnfile</tt>.
