* add a new example using transport and protocol
* rewrite the example using streams to make it much simpler (remove error
  handling, use a simpler Python code)
* copy (and adapt) more documentation from the subprocess module:

  - add a note about Process.wait() deadlock
  - add a note about shell injection
  - etc.

* sort Process methods and attributes in the same order than subprocess.Popen
  methods and attributes, so the documentation looks closer
* list differences between Process and subprocess.Popen APIs

Issue #21332: Ensure that ``bufsize=1`` in subprocess.Popen() selects line buffering, rather than block buffering.

Patch by Akira.

more accurate and sounds less like a strange tale of yore.

a Security Considerations section as preferred by both the devguide
and documentation users who do not wish to go insane.

Patch by Anastasia Filatova.

This was perhaps on the border between a bug fix and a feature since
the Python3 docs did not originally say it was unix only.  However, the
functions never worked anywhere but unix, and the docs were changed to
say it was unix only well before the windows support was added.

Unfortunately, windows support was added in 3.3.4 as well as 3.4.
That leaves us in the uncomfortable position of needing the tag to say
"version changed: 3.3.4" :(

Patch more or less by Nikolaus Rath.

Issue #10197 Tweak docs for subprocess.getstatusoutput and align the documentation, the module docstring, and the function docstring.

Issue #10197: Indicate availability of subprocess.get[status]output on Windows and add a note about the effects of universal newlines

Reformulated the textual change, and applied it to the docstring as well.

The documentation does mention that the streams are opened in text mode
when univeral_newlines is true, but not that that they are opened in
binary mode when that argument is false and that seems to confuse at
least some users.

allowing the subprocess's stdin to be provided as a (byte) string.
Patch by Zack Weinberg.

Closes #4159: add LaTeX tabular column specifications to tables that otherwise are cut off or have overlapping text.

from unbuffered (0) to buffering (-1) to match the behavior existing code
expects and match the behavior of the subprocess module in Python 2 to avoid
introducing hard to track down bugs.

available when configured at compile time.

ee30400efceb which updated the docstring.

universal_newlines is true as on Windows.

no longer implied by shell=True

Patch by Chris Rebert.

Patch by Chris Rebert.