Log Message:
Update "duplicity" package to version 0.4.3. Changes since version 0.4.2:
Move get_password() to Backend class to standardize.
- Fix problem with ftpBackend to create target directory
  if needed.  Note: this creates only one level.
- Dropped ssh-command and added ssh-options to allow users
  to add options to the scp and sftp commmands.
- Removed use of tempfile.TemporaryFile().  This fixes the
  restore problem on Windows that was due to Python bug
  1776696 reported on Sourceforge.
- Fixed Debian Bug#437694: Make bzip2 compression optional.
  The default is not to do bzip2 compression.  To use bzip2
  add the following command line option:
  --gpg-options='--compress-algo=bzip2 --bzip2-compress-level=9'
  Note: do not add spaces in the string value.
- Fixed bug 20764 - unable to use port in ssh backend.
  https://savannah.nongnu.org/bugs/?20764
- Remove ssh_command option, add ssh_options.  This adds
  options to the scp and sftp commands that are used by
  the ssh backend.
- Change ssh backend to send 'quit' instead of EOF when
  using sftp.  This allows it to run under cron as long
  as the password is supplied non-interactively.
- Change ssh backend to not pass :port part of URL to
  scp or sftp.  We already supply -oPort=xx for port.