dev-python/paramiko: apply iqmp-swap patch

[solpeth]

Apply this upstream patch to allow duplicity to work correctly with the paramiko backend, when performing backups over sftp. Otherwise it fails with the error BackendException: ssh connection to <user>@<addr>:22 failed: ('Invalid private key', [_OpenSSLErrorWithText(code=67764350, lib=4, func=160, reason=126, reason_text=b'error:040A007E:rsa routines:RSA_check_key_ex:iqmp not inverse of q')])

I noticed this issue when my periodic duplicity backup via sftp using the paramiko backend started failing as of 2020-08-28. The upstream patch fixing the issue, and included in this pull request, was committed around the same time.

I do not know the cause of the breakage, but this patch does resolve the issue. Tested both with user patches and in an ~amd64 container.

EDIT: as acknowledged in the upstream patch message this breakage may be related to dev-python/cryptography, which upgraded on my system to version 3.1 on the same day the above error began.

[gentoo-repo-qa-bot]

Pull request CI report

Report generated at: 2020-08-29 09:00 UTC
Newest commit scanned: 604986f
Status: ✅ good

There are existing issues already. Please look into the report to make sure none of them affect the packages in question:
https://qa-reports.gentoo.org/output/gentoo-ci/1a53ccaca6/output.html

[gentoo-bot]

Pull Request assignment

Submitter: @solpeth
Areas affected: ebuilds
Packages affected: dev-python/paramiko

dev-python/paramiko: @gentoo/python, @aliceinwire

Linked bugs

Bugs linked: 739576

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[gentoo-repo-qa-bot]

Pull request CI report

Report generated at: 2020-08-29 23:45 UTC
Newest commit scanned: 5d822c3
Status: ✅ good

There are existing issues already. Please look into the report to make sure none of them affect the packages in question:
https://qa-reports.gentoo.org/output/gentoo-ci/1cd7a7ca58/output.html

[gentoo-repo-qa-bot]

Pull request CI report

Report generated at: 2020-09-05 07:46 UTC
Newest commit scanned: ae065a5
Status: ✅ good

There are existing issues already. Please look into the report to make sure none of them affect the packages in question:
https://qa-reports.gentoo.org/output/gentoo-ci/f9d50b8ccf/output.html