Thank you for writing this plugin. It is a complete
asset!
The default username restriction seems
exceptionary while this system is
inclusionary, meaning the default system lets you create exceptions for what you can register, while this system lets you include what can be registered.
This is much better IMO because people could keep finding characters that you haven't put on your ban list, and you would have to make an exception for each one.
It is very important for sites like
mine which in the end will have
MediaWiki integrated into it. MediaWiki can only allow printable characters in page names, and page names can be user names, so user names must be only printable characters. This hack solves the problem.
Again, thank you.
Installed.