pgfouine - www: added a hint on how to obtain a vacuum log per report

Log Message:
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added a hint on how to obtain a vacuum log
per report from Jorgen.Austvik at Sun

Modified Files:
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www:
vacuum.html (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgfouine/www/vacuum.html.diff?r1=1.5&r2=1.6)