Problem to solve
After T178842 some users cannot receive emails because the log entry for account creation belongs to another user.
From @dmaza via email:
We can determine the home wiki by looking at the logging table for log_type = 'newusers' & log_action = 'create'. We could skip the check for # of edits on homewikis and keep the current restrition for other wikis needing a logged action other than the user's autocreation.
This way role users and brand new accounts would be able to receive emails in their home wiki without making any edits.