Add two checkboxes to Upload CSV screen:
* Force password change: if checked, users are forced to change their password on next log in. This was mandatory before, now people uploading CSV files can choose. * E-mail users about accounts: if checked, users are sent an e-mail about their new account. This was never an option before and never happened, now it is on by default. We send a slightly different e-mail based on whether the user needs to change their password or not. This affects the Add User script a tiny bit.