Add cl-indent loop form indentation.

etc/NEWS

@@ -471,6 +471,13 @@ Meta and Alt:
 ---
 ** A French translation of the Emacs Tutorial is available.
 
+---
+** Indentation of simple and extended loop forms han been added to the
+cl-indent package.  The new user options
+`lisp-loop-keyword-indentation', `lisp-loop-forms-indentation', and
+`lisp-simple-loop-indentation' can be used to customize the
+indentation of keywords and forms in loop forms.
+
 ** New modes and packages
 
 +++