anchor.diff:  == Changelog
   
   * *2.8*: The `active_n` option was added.
  +* *2.8*: The `linger_timeout` option was added.
   * *2.8*: The `max_received_frame_rate` default value has
            been multiplied by 10 as the default was too low.
   * *2.7*: Add the options `connection_window_margin_size`,
  
positive.code: of data (from request bodies for example) that may be buffered
  by a single stream before the user code explicitly requests it.
  
  logger (error_logger)::
  
  The module that will be used to write log messages.
  
negative.code:     inactivity_timeout             => timeout(),
      initial_connection_window_size => 65535..16#7fffffff,
      initial_stream_window_size     => 0..16#7fffffff,
      linger_timeout                 => timeout(),
      logger                         => module(),
      max_concurrent_streams         => non_neg_integer() | infinity,
      max_connection_buffer_size     => non_neg_integer(),
  