Knot DNS - version 0.9

New features:
        * TSIG support in both client and server.
        * Use of sendmmsg() on Linux 3.0+ (improves performance).

        * Knot was not accepting AXFR-style IXFR with first SOA in a separate
          packet (i.e. from Power DNS).
        * Wrong SOA TTL in negative answers.
        * Wrong max packet size for outgoing transfers (was causing the
          packets to be malformed).
        * Wrong handling of WKS record in zone compiler.
        * Problems with zone bootstrapping.