function usage($progname)

{

  fprintf(STDERR, "Usage: %s [--no-crawl] [--crawl-only=<school_id1>,<school_id2>,...] [--help] [-h]\n"

	  . "\n"

	  . " -h, --help   Show this usage information and exit.\n"

	  . "\n"

	  . " --no-crawl   Disable crawling during this rehash but preserve\n"

	  . "              previous cached crawl data.\n"

	  . " --crawl-only Takes a comma-separated list of school_ids whose\n"

	  . "              registration systems should be crawled for autofill\n"

	  . "              data. Cached data from schools not listed is preserved\n"

	  . " -v, --verbosity Set the verbosity level. Valid range is from 0\n"

	  $progname);

}