Log Message:
knot: Update to 2.9.3

Changelog:
Version 2.9.3

Tuesday, March 3, 2020
Features:

        New configuration option 'remote.block-notify-after-transfer' to \ 
suppress sending NOTIFY messages
        Enabled testing support for Ed448 DNSSEC algorithm (requires GnuTLS \ 
3.6.12+ and not-yet-released Nettle 3.6+)
        New keymgr parameter 'local-serial' for getting/setting signed zone SOA \ 
serial in the KASP database
        keymgr can import Ed25519 and Ed448 keys in the BIND format (Thanks to \ 
Conrad Hoffmann)

Improvements:

        kdig returns error if the query name is invalid
        Increased 'server.tcp-io-timeout' default value to 500 ms
        Decreased 'database.journal-db-max-size' default value to 512 MiB on \ 
32-bit systems
        Server no longer falls back to AXFR if master is outdated during zone refresh
        Some documentation improvements (including new EPUB format and \ 
compatibility with Ultra Electronics CIS Keyper Plus HSM)
        Some packaging improvements (including new python3-libknot deb package)

Bugfixes:

        Outgoing IXFR can be malformed if the message size has specific size
        Server can crash if the zone contains solo NSEC3 record
        Improved compatibility with older journal format
        Incorrect SOA TTL in negative answers — SOA minimum not considered
        Cannot unset uppercase nodes via control interface #668
        Module RRL doesn't set AA flag and NOERROR rcode in slipped responses
        Server returns FORMERR instead of NOTIMP if empty QUESTION and unknown OPCODE