This particular article has mostly been unaltered since the establishment of the Mediawiki-based Wiki on Daniel's site, meaning that whoever included that sentence in the text did so before 2011. Unfortunately, we don't have access to the edit history of Daniel's Tikiwiki, so we can't really trace it further.
Anyone interested in editing the Wiki can just ask me to set them up with an account. I have called for help with sorting out the Wiki multiple times in the past, but as it stands I'm the only somewhat active editor. The only reason we don't have open registration is that the last time I tried this we got flooded with spambots, and there never was enough interest to warrant looking into technical solutions other than me manually creating accounts.
If you're willing to help, send me a PM and I'll hook you up with an account. If you include an e-mail address, I'll have a password randomly generated and sent to you without me seeing it. Otherwise, I'll have to make one up and PM you back.