of "SCALAR(0x81485ec)" in order to be more consistent with the return
value of ref().
+=head2 pack/unpack D/F recycled
+
+The undocumented pack/unpack template letters D/F have been recyled
+for better use: now they stand for long double (if supported by the
+platform) and NV (Perl internal floating point type). (They used
+to be aliases for f/d, but you never knew that.)
+
=head2 Deprecations
=over 4
C<pack() / unpack()> can now process the Perl internal numeric types:
IVs, UVs, NVs-- and also long doubles, if supported by the platform.
+The template letters are C<j>, C<J>, C<F>, and C<D>.
=item *
=item *
+C<if> is a new pragma for conditional inclusion of modules, from
+Ilya Zakharevich.
+
+=item *
+
L<libnet> is a collection of perl5 modules related to network
programming, from Graham Barr. See L<Net::FTP>, L<Net::NNTP>,
L<Net::Ping>, L<Net::POP3>, L<Net::SMTP>, and L<Net::Time>.
=item *
+C<Tie::Memoize>, by Ilya Zakharevich, provides on-demand loaded hashes.
+
+=item *
+
C<Tie::RefHash::Nestable>, by Edward Avis, allows storing hash
references (unlike the standard Tie::RefHash) The module is contained
within Tie::RefHash, see L<Tie::RefHash>.