This allows disabling all client tests using a conftest.py file, if for
example #56 gets merged and the server supports more python versions
then the server.

The server side tests are very incomplete.

Due to nested shells, we need to have multiple layers of quoting. Yuck.

Closes #80

In situations where 2.7 is available and some unsupported 3.x is the
system's default we should probably fallback to 2.7 instead of the
default (that might be e.g. 3.4). This might fix #78.

The fish shell doesn’t support ‘||’ and requires a ‘—python python’
workaround.  This change explicitly calls /bin/sh for the remote shell
commands.

Just because we may have found IPv6 DNS servers from /etc/resolv.conf
doesn't mean we should force IPv6 support.

Instead we should disable the IPv6 DNS servers if IPv6 is disabled.

Note: this will also result in any IPv6 servers specified on the command
line being silently ignored too.

Specifying an IPv6 subnet will still require IPv6 support.

Closes #74

Closes #73.

In some cases (see #43) it seems that some network configurations may
end up setting a skip on lo. As sshuttle adds rules that rely on
filtering/translating packets on lo, this causes problem. This fix
overrides the skip and makes the rules be applied again.
Should fix at least some of the problems reported on #43.

This will make it easier to support other platforms/versions in the
future, e.g., OpenBSD.

This is the error message that this commit fixes:
TypeError: sequence item 142: expected a bytes-like object, str found

Complete what 1c46f25e started, more or less.

Closes: #68

Wew were trying to allocate an IPv6 socket even though we weren't using
IPv6, causing failures on systems without IPv6 support available.

This change means a number of methods on MultiListener, e.g. setsockopt,
should not be called until after the bind call.

Closes #68

Closes: #65

And some subtle grammar.

Closes: #66

Copied from https://coderwall.com/p/adfxgw/sshuttle-on-windows

Closes #64

It is autogenerated.

Closes #60.

Suspect it is causing sphinx to crash on readthedocs. See
https://github.com/sphinx-doc/sphinx/issues/1871

Not required as we are not documenting the source code.

See #60

this should also be backwards compatible with python 2

Fix the following error. Looks like we have to have a function to call
for the entrypoint.

$ pip install dist/sshuttle-0.76.dev8_ngf59508f4-py2-none-any.whl
Processing ./dist/sshuttle-0.76.dev8_ngf59508f4-py2-none-any.whl
Installing collected packages: sshuttle
Exception:
Traceback (most recent call last):
  File "/tmp/ddd/local/lib/python2.7/site-packages/pip/basecommand.py", line 211, in main
    status = self.run(options, args)
  File "/tmp/ddd/local/lib/python2.7/site-packages/pip/commands/install.py", line 311, in run
    root=options.root_path,
  File "/tmp/ddd/local/lib/python2.7/site-packages/pip/req/req_set.py", line 646, in install
    **kwargs
  File "/tmp/ddd/local/lib/python2.7/site-packages/pip/req/req_install.py", line 803, in install
    self.move_wheel_files(self.source_dir, root=root)
  File "/tmp/ddd/local/lib/python2.7/site-packages/pip/req/req_install.py", line 998, in move_wheel_files
    isolated=self.isolated,
  File "/tmp/ddd/local/lib/python2.7/site-packages/pip/wheel.py", line 479, in move_wheel_files
    maker.make_multiple(['%s = %s' % kv for kv in console.items()])
  File "/tmp/ddd/local/lib/python2.7/site-packages/pip/_vendor/distlib/scripts.py", line 364, in make_multiple
    filenames.extend(self.make(specification, options))
  File "/tmp/ddd/local/lib/python2.7/site-packages/pip/_vendor/distlib/scripts.py", line 353, in make
    self._make_script(entry, filenames, options=options)
  File "/tmp/ddd/local/lib/python2.7/site-packages/pip/_vendor/distlib/scripts.py", line 244, in _make_script
    script = self._get_script_text(entry).encode('utf-8')
  File "/tmp/ddd/local/lib/python2.7/site-packages/pip/wheel.py", line 396, in _get_script_text
    "import_name": entry.suffix.split(".")[0],
AttributeError: 'NoneType' object has no attribute 'split'

These files were included, however just to make sure.