paramiko: Update to new upstream version 1.12.1.
paramiko: Update to new upstream version 1.12.1.

This release contains only minor fixes, which are:

 * Fix AttributeError bugs in known_hosts file (re)loading.
 * Note ecdsa requirement in README.

Full changelog with credits and issue IDs can be found at:

https://github.com/paramiko/paramiko/blob/master/NEWS

Signed-off-by: aszlig <ee1aa092358634f9c53f01b5a783726c9e21b35a@redmoonstudios.org>

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