Bugfix release 5.x.2.16

  -- Cleans up missing profile element titles on the settings page.
  -- Backports the following issues from the HEAD development track:
    -- Adds integration with Domain Access.
    -- Cleans up settings page, placing default items on top and formatting the Content Settings using
      a proper form theme function.
    -- Fixes error with possible null value passed to load includes.
    -- Uses static variables to eliminate redundant database queries.
    -- Corrects item settings page.
    -- Fixes logic error in theme_mysite_empty_column().
    -- #205441 by WiSeOz.  Profile.inc always links to user/0.
    -- #205252 by WiSeOz.  Profile.inc default settings did not use user 1.
    -- Fixes logic errors in mysite_reset sequence.
    -- #206721 by WiSeOz.  The profile.inc needs to force user_load() in order
      to fetch all user profile data from contributed modules.