ssh: connect to host 
quigon.federez.net port 22: Connection refused
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/cliapp/app.py", line 189, in _run
    self.process_args(args)
  File "/usr/lib/python2.7/dist-packages/obnamlib/app.py", line 222, in
process_args
    cliapp.Application.process_args(self, args)
  File "/usr/lib/python2.7/dist-packages/cliapp/app.py", line 570, in
process_args
    method(args[1:])
  File "/usr/lib/python2.7/dist-packages/obnamlib/plugins/forget_plugin.py",
line 46, in forget
    self.repo = self.app.get_repository_object()
  File "/usr/lib/python2.7/dist-packages/obnamlib/app.py", line 258, in
get_repository_object
    repofs.connect()
  File "/usr/lib/python2.7/dist-packages/obnamlib/plugins/sftp_plugin.py", line
195, in connect
    if not try_openssh or not self._connect_openssh():
  File "/usr/lib/python2.7/dist-packages/obnamlib/plugins/sftp_plugin.py", line
239, in _connect_openssh
    self.sftp = paramiko.SFTPClient(SSHChannelAdapter(proc))
  File "/usr/lib/python2.7/dist-packages/paramiko/sftp_client.py", line 101, in
__init__
    raise SSHException('EOF during negotiation')
SSHException: EOF during negotiation