LibreSSL 2.7.0 Released

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LibreSSL 2.7.0 Released

Brent Cook
We have released LibreSSL 2.7.0, which you can now download from
LibreSSL directory of your local OpenBSD mirror. This is the first
release from the 2.7 series, which will be part of OpenBSD 6.3.

It includes the following changes:

 * Added support for many OpenSSL 1.0.2 and 1.1 APIs, based on
   observations of real-world usage in applications. These are
   implemented in parallel with existing OpenSSL 1.0.1 APIs - visibility
   changes have not been made to existing structs, allowing code written
   for older OpenSSL APIs to continue working.

 * Extensive corrections, improvements, and additions to the
   API documentation, including new public APIs from OpenSSL that had
   no pre-existing documentation.

 * Added support for automatic library initialization in libcrypto,
   libssl, and libtls. Support for pthread_once or a compatible
   equivalent is now required of the target operating system. As a
   side-effect, minimum Windows support is Vista or higher.

 * Converted more packet handling methods to CBB, which improves
   resiliency when generating TLS messages.

 * Completed TLS extension handling rewrite, improving consistency of
   checks for malformed and duplicate extensions.

 * Rewrote ASN1_TYPE_{get,set}_octetstring() using templated ASN.1.
   This removes the last remaining use of the old M_ASN1_* macros
   (asn1_mac.h) from API that needs to continue to exist.

 * Added support for client-side session resumption in libtls.
   A libtls client can specify a session file descriptor (a regular
   file with appropriate ownership and permissions) and libtls will
   manage reading and writing of session data across TLS handshakes.

 * Improved support for strict alignment on ARMv7 architectures,
   conditionally enabling assembly in those cases.

 * Fixed a memory leak in libtls when reusing a tls_config.

 * Merged more DTLS support into the regular TLS code path, removing
   duplicated code.

 * Many improvements to Windows Cmake-based builds and tests,
   especially when targeting Visual Studio.

The LibreSSL project continues improvement of the codebase to reflect
modern, safe programming practices. We welcome feedback and improvements
from the broader community. Thanks to all of the contributors who helped
make this release possible.