Allowing the Developer Filter the Regex on wpmu_validate_user_signup()
|Reported by:||webord||Owned by:|
So I've been having a problem with the way WordPress Multisite handles the restriction for new users.
Looking at the file ms-functions.php, I saw no Filter to the regular expression applied on the user_name to do it's validation.
I've changed like this, so by default you will be restricted to the [a-z0-9] pattern, but if needed the developer should have the power to filter that.
This might need a patch for the domains.