* mh-acros.el (mh-defun-compat): Rename to defun-mh in order that

* mh-acros.el (mh-defun-compat): Rename to defun-mh in order that
variables and functions with the same name are found correctly by
find-func (invoked by clicking on the filename link in the *Help*
buffer.
(mh-defmacro-compat): Rename to defmacro-mh. Ditto. *
mh-e.el: (mh-defgroup): Rename to defgroup-mh. Ditto.
(mh-defcustom): Rename to defcustom-mh. Ditto.
(mh-defface): Rename to defface-mh. Ditto.
(mh-font-lock-add-keywords): Make changes according to these
renamings.

* mh-e.el, mh-compat.el, mh-gnus.el: Use the new names (closes SF
#1472029).