GitLab

* subr.el (locate-user-emacs-file): New function.
  (user-emacs-directory): Mention it in docstring.

* completion.el (save-completions-file-name):
* filesets.el (filesets-menu-cache-file):
* image-dired.el (image-dired-dir, image-dired-db-file)
  (image-dired-temp-image-file, image-dired-gallery-dir)
  (image-dired-temp-rotate-image-file):
* savehist.el (savehist-file):
* server.el (server-auth-dir):
* startup.el (auto-save-list-file-prefix):
* thumbs.el (thumbs-thumbsdir):
* tutorial.el (tutorial--saved-dir):
* play/gamegrid.el (gamegrid-user-score-file-directory): Use it.

* url.el (url-configuration-directory): Use `locate-user-emacs-file'.

* NEWS: New function `locate-user-emacs-file'.