When the MediaWiki code generates an URL to something other than the default view of a wiki page, especially if the URL is then requested in the background, the URL should be in standard fullurl format, for instance /w/index.php?title=Special:BackofficeStuff&foo=bar instead of /wiki/Special:BackofficeStuff?foo=bar .
This sometimes doesn't happen, see T116609: View counts in squid logs, webstatscollector 2.0 and hive are very dissimilar for several projects. [5 pts]. We'd need to make a list of files where URLs are generated manually or hardcoded in a non-standard way.