link is ignored in defface - contradicts Elisp manual

[Drew Adams]

Elisp manual, node Common Keywords:

  All kinds of customization declarations (for variables and groups, and
  for faces) accept keyword arguments for specifying various information.
  This section describes some keywords that apply to all kinds.

Note that it specifically mentions "faces" and says that this section
applies to "all kinds" - so, including faces.

Customize-face does correctly show the link provided by a :link that
is applied to a defface in that group. However, customize-group does
not show this link for the face.

Or (I am not sure), perhaps customize-group only shows the :link link
for the first entry of a group (instead of the :link links for each
entry)? If I have a defcustom and some deffaces all in the same group,
and I apply a :link to the defcustom and each of the deffaces, in the
customize-group buffer only the defcustom entry gets a :link link.

In GNU Emacs 22.0.50.1 (i386-mingw-nt5.1.2600)
 of 2005-06-26 on NONIQPC
X server distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc
(3.3) --cflags -I../../jpeg-6b-3/include -I../../libpng-1.2.8/include -I../.
./tiff-3.6.1-2/include -I../../xpm-nox-4.2.0/include -I../../zlib-1.2.2/incl
ude'