py-msgpack 1.0.0 upgrade broke salt

[Florian Obser]

The release notes have

* Remove encoding option from the Packer and Unpacker.

( https://github.com/msgpack/msgpack-python/blob/v1.0.0/ChangeLog.rst )

$ doas salt-minion                                          

Process Process-1:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/multiprocessing/process.py", line 267, in 
_bootstrap
    self.run()
  File "/usr/local/lib/python2.7/multiprocessing/process.py", line 114, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/lib/python2.7/site-packages/salt/scripts.py", line 146, in 
minion_process
    minion.start()
  File "/usr/local/lib/python2.7/site-packages/salt/cli/daemons.py", line 348, 
in start
    self.minion.tune_in()
  File "/usr/local/lib/python2.7/site-packages/salt/minion.py", line 1026, in 
tune_in
    self._bind()
  File "/usr/local/lib/python2.7/site-packages/salt/minion.py", line 940, in 
_bind
    self.event = salt.utils.event.get_event('minion', opts=self.opts, 
io_loop=self.io_loop)
  File "/usr/local/lib/python2.7/site-packages/salt/utils/event.py", line 143, 
in get_event
    raise_errors=raise_errors)
  File "/usr/local/lib/python2.7/site-packages/salt/utils/event.py", line 271, 
in __init__
    self.connect_pub()
  File "/usr/local/lib/python2.7/site-packages/salt/utils/event.py", line 383, 
in connect_pub
    io_loop=self.io_loop
  File "/usr/local/lib/python2.7/site-packages/salt/transport/ipc.py", line 
257, in __new__
    client.__singleton_init__(io_loop=io_loop, socket_path=socket_path)
  File "/usr/local/lib/python2.7/site-packages/salt/transport/ipc.py", line 
620, in __singleton_init__
    socket_path, io_loop=io_loop)
  File "/usr/local/lib/python2.7/site-packages/salt/transport/ipc.py", line 
280, in __singleton_init__
    self.unpacker = msgpack.Unpacker(encoding=encoding)
TypeError: __init__() got an unexpected keyword argument 'encoding'

Thanks,
Florian

-- 
I'm not entirely sure you are real.