+ -- Motif is now deprecated on linux and cygwin.
+ -- On UNIX and linux, '--with-widgets=no' is now the default. If
+ you want buffer tabs or the progress bar, you must run configure
+ with the option '--with-widgets=lucid' or a different toolkit.
+ -- PUI related changes (Package User Interface)
+ - A minor rearrangement of the "Tools -> Packages" menu.
+ - Only a single package download site can be selected.
+ - Managing packages via the `customize' interface is no longer
+ supported.
+ - Non-Mule XEmacsen can not install Mule packages.
+ - The "mule-base" package is not needed to "bootstrap" PUI for
+ Mule enabled XEmacsen.
+ - The default for PGP verifying the package-index file is "off" in
+ 21.4.
+ - The default package-index filename has changed to
+ `package-index.LATEST.gpg'.
+ - The location of the local index file is customisable. See
+ `package-get-package-index-file-location'.
+ - `pui-add-install-directory' has been obsoleted and replaced by
+ `pui-set-local-package-get-directory'.