crashes on debian 10.1, python 3.7.3

[hoosierEE]

From a fresh clone of this repo, master branch, I modified the first line to be this:

#!/usr/bin/python3

It crashes:

./ssh-ident me@somehost

Traceback (most recent call last):
  File "./ssh-ident", line 316, in <module>
    import distutils.spawn
ModuleNotFoundError: No module named 'distutils.spawn'

Python3's distutils module has a different interface from python2, but my sense is that you're mainly using it for the find_executable feature. There is shutil.which() in python3 that might be a good alternative.

[hoosierEE]

I created a pull request for this at #56