Merge branch 'pull-request-245'

* pull-request-245:
  coding corrections. correct type hint, remove unused variable assignment
  HTTPClient don't pull too much bytes when no content-length is given
  de/de-informal: localization updates (delete user function)
  unit tests for self deleting of user accounts
  FS#2751 - self deletion of user account

Conflicts:
	inc/lang/de-informal/lang.php
	inc/lang/de/lang.php