concrete5/concrete5 — pull request #1758 by mlocati (2014-04-24 13:14:54+00:00)
Title: Inhibit creation of another admin user

When creating new users, we check if it does not have the `admin` username.
Let's perform this check in a case-insensitive way.

BTW, this shouldn't be a big issue, since we already check if another user with the new username already exists. So, we could also remove these checks… (and indeed this check is not performed while updating existing users)