- update to 2.6.9:
* Remove unused function prototype crypto_adjust_frame_parameters
* Log SSL alerts more prominently
* Document tls-exit option mainly as test option
* Remove TEST_GET_DEFAULT_GATEWAY as it duplicates --show-gateway
* Fix check_session_buf_not_used using wrong index
* Add missing check for nl_socket_alloc failure
* Add check for nice in cmake config
* Remove compat versionhelpers.h and remove cmake/configure check for it
* Extend the error message when TLS 1.0 PRF fails
* Fix unaligned access in macOS, FreeBSD, Solaris hwaddr
* Check PRF availability on initialisation and add --force-tls-key-material-export
* Make it more explicit and visible when pkg-config is not found
* Clarify that the tls-crypt-v2-verify has a very limited env set
* Implement the --tls-export-cert feature
* Remove conditional text for Apache2 linking exception
* Remove --tls-export-cert
* Remove superfluous x509_write_pem()
* sample-keys: renew for the next 10 years
* GHA: clean up libressl builds with newer libressl
* configure.ac: Remove unused AC_TYPE_SIGNAL macro
* documentation: remove reference to removed option --show-proxy-settings
* unit_tests: remove includes for mock_msg.h
* documentation: improve documentation of --x509-track
* NTLM: add length check to add_security_buffer
* NTLM: increase size of phase 2 response we can handle
* proxy-options.rst: Add proper documentation for --http-proxy-user-pass
* buf_string_match_head_str: Fix Coverity issue 'Unsigned compared against 0'
* --http-proxy-user-pass: allow to specify in either order with --http-proxy
* README.cmake.md: Document minimum required CMake version for --preset