FIXME about Windows resource CHMfulness hint.

The thing I added in 8b7458119f turns out not to be visible in
Explorer's UI, at least. Oh well, maybe it'll be useful to someone.

windows/version.rc2

@@ -47,6 +47,8 @@ BEGIN
 	    VALUE "InternalName",	APPNAME
 	    VALUE "OriginalFilename",	APPNAME
 #if (defined HELPVER)
+	    /* FIXME: this doesn't seem to be visible in Win7/Win10's UI.
+	     * Oh well. */
 	    VALUE "FileVersion",	TEXTVER HELPVER
 #else
 	    VALUE "FileVersion",	TEXTVER