[ANN] yahns 1.12.2 -_- sleepy app server for Ruby

[Eric Wong <normalperson@yhbt.net>]

A Free Software, multi-threaded, non-blocking network
application server designed for low _idle_ power consumption.
It is primarily optimized for applications with occasional users
which see little or no traffic.  yahns currently hosts Rack/HTTP
applications, but may eventually support other application
types.  Unlike some existing servers, yahns is extremely
sensitive to fatal bugs in the applications it hosts.

Changes:

    yahns 1.12.2 - minor doc and TLS fixes

    This release ensures OpenSSL::SSL::SSLContext#session_id_context
    is always set for OpenSSL users.  It won't overwrite existing
    settings, but setting it to a random value is necessary to
    ensure clients do not get aborted connections when attempting to
    use a session cache.

    No need to actually upgrade if you're on 1.12.1, you may add the
    following to your yahns_config(5) file where
    OpenSSL::SSL::SSLContext is configured:

	# recommended, not required.  This sets safer defaults
	# provided by Ruby on top of what OpenSSL gives:
	ssl_ctx.set_params

	# required, and done by default in v1.12.2:
	ssl_ctx.session_id_context ||= OpenSSL::Random.random_bytes(32)

    yahns gives you full control of of how OpenSSL::SSL::SSLContext is
    configured.  To avoid bugs, yahns only ensures
    OpenSSL::SSL::SSLContext#session_id_context is set (if not previously
    set by the user) and calls OpenSSL::SSL::SSLContext#setup before
    spawning threads to avoid race conditions.  yahns itself does not and
    will not enforce any opinion on the compatibility/performance/security
    trade-offs regarding TLS configuration.

    Note: keep in mind using an SSL session cache may be less useful
    with yahns because HTTP/1.1 persistent connections may live
    forever :)

    3 bug/doc fixes on top of v1.12.1:
          document OpenSSL::SSL::SSLContext#set_params use
          ssl: ensure is session_id_context is always set
          test/*: fix mktmpdir usage for 1.9.3

Please note the disclaimer:

  yahns is extremely sensitive to fatal bugs in the apps it hosts.  There
  is no (and never will be) any built-in "watchdog"-type feature to kill
  stuck processes/threads.  Each yahns process may be handling thousands
  of clients; unexpectedly killing the process will abort _all_ of those
  connections.  Lives may be lost!

  yahns hackers are not responsible for your application/library bugs.
  Use an application server which is tolerant of buggy applications
  if you cannot be bothered to fix all your fatal bugs.

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