fix libdecaf configure option (was probably copied from the libsodium paragraph)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
`libdecaf <https://sourceforge.net/projects/ed448goldilocks/>`_ is a library that allows the PowerDNS Recursor to support ed25519 and Ed448 (DNSSEC algorithms 15 and 16).
-To detect libsodium, use the ``--enable-libsodium`` configure option.
+To detect libdecaf, use the ``--enable-libdecaf`` configure option.
systemd notify support
^^^^^^^^^^^^^^^^^^^^^^