Fix regression that this test would have caught.

in debug mode

sys.stderr, to get output even if tests are run with the -j command line
option.

* Tulip issue #184: Log subprocess events in debug mode

  - Log stdin, stdout and stderr transports and protocols
  - Log process identifier (pid)
  - Log connection of pipes
  - Log process exit
  - Log Process.communicate() tasks: feed stdin, read stdout and stderr
  - Add __repr__() method to many classes related to subprocesses


* Add BaseSubprocessTransport._pid attribute. Store the pid so it is still
  accessible after the process exited. It's more convinient for debug.

* create_connection(): add the socket in the "connected to" debug log

* Clean up some docstrings and comments. Remove unused unimplemented
  _read_from_self().

test purposes are now reflected in GrepDialog and ReplaceDialog.  Docstrings
are improved. Initial patch by Saimadhav Heblikar

broken by the fix for security issue #19435.  Patch by Zach Byrne.

broken by the fix for security issue #19435.  Patch by Zach Byrne.

broken by the fix for security issue #19435.  Patch by Zach Byrne.

broken by the fix for security issue #19435.  Patch by Zach Byrne.

Contributed by Anton Barkovsky.

* Tulip issue #183: log socket events in debug mode

  - Log most important socket events: socket connected, new client, connection
    reset or closed by peer (EOF), etc.
  - Log time elapsed in DNS resolution (getaddrinfo)
  - Log pause/resume reading
  - Log time of SSL handshake
  - Log SSL handshake errors
  - Add a __repr__() method to many classes

* Fix ProactorEventLoop() in debug mode. ProactorEventLoop._make_self_pipe()
  doesn't call call_soon() directly because it checks for the current loop
  which fails, because the method is called to build the event loop.

* Cleanup _ProactorReadPipeTransport constructor. Not need to set again
  _read_fut attribute to None, it is already done in the base class.

- Fix the documentation of Server.close(): it closes sockets
- Replace AbstractServer with Server
- Document Server.sockets attribute

- loop, waiters and active_count attributes are now private
- attach(), detach() and wakeup() methods are now private

The sockets attribute remains public.

Patch by Zachary Ware.

Initial patch by Phil Elson.

if the file is much smaller. Add @bigmemtest decorator to the new
test_large_read().

:c:type:`int` for the size to support reading more than 2 GB at once. On
Windows, the size is truncted to INT_MAX. As any call to os.read(), the OS
may read less bytes than the number of requested bytes.

* Tulip issue #182: Improve logs of BaseEventLoop._run_once()

  - Don't log non-blocking poll
  - Only log polling with a timeout if it gets events or if it timed out after
    more than 1 second.

* Fix some pyflakes warnings: remove unused imports

* Tulip issue #182: Improve logs of BaseEventLoop._run_once()

  - Don't log non-blocking poll
  - Only log polling with a timeout if it gets events or if it timed out after
    more than 1 second.

* Fix some pyflakes warnings: remove unused imports