GitLab

make scrutinizer happier and always count users on assisted mode, even with xp'ed mode (would be a regression otherwise)

to reassure that selected attributes still work, do not count all matching entries but limit it to 1 in order to make it faster

detectors (email, displayname..) are now started in one place, triggered from only 2 places. more reliable structure and flow, saves requests

* otherwise it will always think it hits the limit and need another round to fetch additional results

Also explicitly format sub-id integers as unsigned, which is required for
32-bit systems.