Knot DNS v1.0.4

New features:
        * Parallel loading of zones to the server.
        * RFC3339-complaint format of log time.
        * Support for TLSA (RR type 52).
        * knotc checkzone (as a dry-run of zone compile).
        * knotc refresh for forcing Knot to update all zones from master
        * Reopening log files upon start (used to truncate them).

        * Copying OPCODE and RD bit from query to NOTIMPL responses.
        * Corrected response to CNAME queries if the canonical name was also
          an alias (was adding the whole CNAME chain to the response).
        * Fixed crash when NS or MX points to an alias.
        * Fixed problem with early closing of filedescriptors (lead to crash
          when compiling and loading or bootstrapping and restarting the
          server with a lot of zones).

Other improvements:
        * Significantly sped up IXFR-in and reduced its memory requirements.