0.5.0 require dulwich-0.9.1

[powerman]

README says "requires at least Dulwich 0.8.6", but 0.9.0 throws:

  File "/usr/lib64/python2.7/site-packages/hggit/git_handler.py", line 891, in upload_pack
    new_refs = client.send_pack(path, changed, genpack)
  File "/usr/lib64/python2.7/site-packages/dulwich/client.py", line 441, in send_pack
    proto, unused_can_read = self._connect('receive-pack', path)
  File "/usr/lib64/python2.7/site-packages/dulwich/client.py", line 634, in _connect
    con = get_ssh_vendor().connect_ssh(
AttributeError: '_Vendor' object has no attribute 'connect_ssh'

0.9.1 works fine, so I suppose it's minimal requirement now.

[schinckel]

This issue can be closed: the current requirement is for 0.9.7+