[Twisted-Python] Twisted 19.2.0 Release Announcement

[Amber Brown]

On behalf of Twisted Matrix Laboratories, I am honoured to announce the 
release of Twisted 19.2! The highlights of this release are:

  * twisted.web.client.HostnameCachingHTTPSPolicy was added as a new
    contextFactory option. This reduces the performance overhead for
    making many TLS connections to the same host.
  * twisted.conch.ssh.keys can now read private keys in the new
    "openssh-key-v1" format, introduced in OpenSSH 6.5 and made the
    default in OpenSSH 7.8.
  * The sample code in the "Twisted Web In 60 Seconds" tutorial runs on
    Python 3.
  * DeferredLock and DeferredSemaphore can be used as asynchronous
    context managers on Python 3.5+.
  * twisted.internet.ssl.CertificateOptions now uses 32 random bytes
    instead of an MD5 hash for the ssl session identifier context.
  * twisted.python.failure.Failure.getTracebackObject now returns
    traceback objects whose frames can be passed into
    traceback.print_stack for better debugging of where the exception
    came from.
  * Much more! 20+ tickets closed overall.

You can find the downloads at <https://pypi.python.org/pypi/Twisted> (or 
alternatively <http://twistedmatrix.com/trac/wiki/Downloads>). The NEWS 
file is also available at 
<https://github.com/twisted/twisted/blob/twisted-19.2.0/NEWS.rst>.

Many thanks to everyone who had a part in this release - the supporters 
of the Twisted Software Foundation, the developers who contributed code 
as well as documentation, and all the people building great things with 
Twisted!

Twisted Regards,
Amber Brown (HawkOwl)
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