Remove user search from the /search space and move it to /admin/people -- that is, instead of /search/user the functionality for searching users is found at /admin/people/search
This is useful for when you want make it easier for administrators to find the user search, and you don't want regular visitors and members of your site to see a search for user profiles alongside the search for content (indeed, you likely don't want tabs on the search page at all).
This module leaves the possibility of also of allowing people to see user profiles but moving search out from where anyone would find it. (Drupal 7 needlessly ties permission to search people to permission to access people's profiles, though alternatively or in addition to this pseudo-fix a menu alter could be used to assign a new permission to user search.)
(Very raw notes on the making of this module.)