If you prefer to manually edit your configuration files, use the following syntax for this option:

#A pattern matching all referrers from our own site;
#useful to filter out internal links, making external
#links to our site stand out. Note the asterisk at the end!
ignorereferrers
http://www.boutell.com*
end ignorereferrers

The Ignored Referring URLs ^{(ignorereferrers)} option indicates which referring URLs will be ignored by wusage for purposes of generating the referrers report. Referring URLs which match any of the patterns listed for the Ignored Referring URLs ^{(ignorereferrers)} option will be ignored only for purposes of the referrers report; they are included normally in other reports. Each character of the referring URL is matched against the pattern. An * in the pattern matches any number of characters in the referring URL. Patterns have additional features, including support for regular expressions; for more information about patterns, see the Patterns and Regular Expressions section. If the Ignored Referring URLs ^{(ignorereferrers)} option is absent, no referring URLs will be ignored.