Include/exclude lists

Is there any way other than the config files to specify the url filter
parameters?  I have a few dozen sites to crawl, and for each site I
want to specify its own includes and excludes.  I don't want to have
to go into the config file and change the
<property><name>urlfilter.regex.file</name> each time.  Can I specify
that on the command line to bin/nutch generate or something?

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