The ©info keyword should not be used manually.

Differential Revision:	https://reviews.freebsd.org/D2479
Approved by:	gjb (mentor)
Sponsored by:	Absolight

en_US.ISO8859-1/books/porters-handbook/plist/chapter.xml

@@ -354,7 +354,9 @@ etc/orbit.conf-dist
       <para>Add the file passed as argument to the plist, and updates
 	the info document index on installation and deinstallation.
 	Additionally, it removes the index if empty on
-	deinstallation.</para>
+	deinstallation.  This should never be used manually, but
+	always through <varname>INFO</varname>.  See <xref
+	  linkend="makefile-info"/> for more informations.</para>
     </sect2>
 
     <sect2 xml:id="plist-keywords-kld">