This release fixes a crash bug in delegation answers, and fixes
in NSEC3 answers. Also compile fixes for OpenSSL. The OpenSSL 3.0
API is supported.

The Mutual TLS feature allows for client authentication for XFR-over-TLS
connections, use the client-cert, client-key and client-key-pw options
to set up the certificate that NSD then uses to connect to the upstream
server to download the zone with.

The default for DNS Cookies is updated. It is now off to
stop wrong behaviour in mixed server deployments.

4.3.8

FEATURES:

• Merge #185 by cesarkuroiwa: Mutual TLS.
• Set default for answer-cookie to no. Because in server deployments
  with mixed server software, a default of yes causes issues.

BUG FIXES:

• Fix to compile with OpenSSL 3.0.0beta2.
• Fix configure detection of SSL_CTX_set_security_level.
• Fix deprecated functions use from openssl 3.0.0beta2.
• For #184: Note that all zones can be targeted by some nsd-control
  commands in the man page.
• Fixes for #185: Document client-cert, client-key and client-key-pw
  in the man page. Fix yacc semicolon. Fix unused variable warning.
  Use strlcpy instead of strncpy. Fix spelling error in error
  printout.
• Merge #187: Support using system-wide crypto policies.
• Fix #188: NSD fails to build against openssl 1.1 on CentOS 7.
• Fix sed script in ssldir split handling.
• Fix #189: nsd 4.3.7 crash answer_delegation: Assertion
  `query->delegation_rrset' failed.
• Fix #190: NSD returns 3 NSEC3 records for NODATA response.
• Fix compile failure with openssl 1.0.2.
• Fix #194: Incorrect NSEC3 response for SOA query below delegation
  point.