Merge pull request #323 from pmazzini/ssh #215

Job	Run time
test (py2.6, ubuntu-latest, centos:6, 2.6)	6m 12s
test (py3.10 with ossl3.0, ubuntu-latest, ubuntu:22.04, 3.10, py310)	3m 22s
test (py2.7, ubuntu-20.04, 2.7, py27)	3m 33s
test (py2.7 with old gmpy, ubuntu-20.04, 2.7, py27_old_gmpy)	1m 19s
test (py2.7 with old gmpy2, ubuntu-20.04, 2.7, py27_old_gmpy2)	3m 11s
test (py2.7 with old six, ubuntu-20.04, 2.7, py27_old_six)	3m 45s
test (py2.7 with gmpy, ubuntu-20.04, 2.7, gmpypy27)	3m 18s
test (py2.7 with gmpy2, ubuntu-20.04, 2.7, gmpy2py27)	3m 18s
test (py3.5, ubuntu-20.04, 3.5, py35)	3m 45s
test (py3.6, ubuntu-20.04, 3.6, py36)	3m 16s
test (py3.7, ubuntu-latest, 3.7, py37)	3m 7s
test (py3.8, ubuntu-latest, 3.8, py38)	3m 11s
test (py3.9, ubuntu-latest, 3.9, py39)	3m 1s
test (py3.10, ubuntu-latest, 3.10, py310)	3m 4s
test (py3.10 with gmpy, ubuntu-latest, 3.10, gmpypy310)	3m 13s
test (py3.10 with gmpy2, ubuntu-latest, 3.10, gmpy2py310)	3m 3s
test (py3.11, ubuntu-latest, 3.11, py311)	3m 3s
test (py3.12, ubuntu-latest, 3.12.0-beta.1, py312)	4m 9s
test (pypy, ubuntu-latest, pypy-2.7, pypy)	6m 0s
test (pypy3, ubuntu-latest, pypy-3.7, pypy3)	7m 5s
test (py2.7 with instrumental, ubuntu-20.04, 2.7, instrumental)	4m 13s
test (code checks, ubuntu-latest, 3.9, codechecks)	2m 21s
Indicate completion to coveralls.io	19s
	1h 20m 48s

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