sshuttle dies with a SyntaxError when connecting to older servers

[Malte S. Stretz]

I upgraded from wily to xenial a few days ago and now sshuttle is broken:

sshuttle -r example.net 10.49.0.0/16
[local sudo] Password:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "assembler.py", line 22, in <module>
  File "sshuttle.helpers", line 73
    except socket.error as e:
                         ^
SyntaxError: invalid syntax
client: fatal: server died with error code 1

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: sshuttle 0.76-1
ProcVersionSignature: Ubuntu 4.4.0-22.39-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: KDE
Date: Mon May 9 13:42:13 2016
InstallationDate: Installed on 2016-01-03 (126 days ago)
InstallationMedia: Kubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
PackageArchitecture: all
SourcePackage: sshuttle
UpgradeStatus: Upgraded to xenial on 2016-05-07 (1 days ago)

[Malte S. Stretz (mss)]

The current version of sshuttle is 0.78, maybe it is fixed there:
  https://pypi.python.org/pypi/sshuttle

[Malte S. Stretz (mss)]

sshuttle changelog: http://sshuttle.readthedocs.io/en/stable/changes.html

[Malte S. Stretz (mss)]

The sshuttle version from yakkety (0.78.0-1) works. The server I try to connect to is rather old so this is probably "Make server parts work with old versions of Python. Fixes #81."