Error importing from myproxy.client import MyProxyClient with Python=3.12 due to SafeConfigParser being completely retired

[valeriupredoi]

Hi Phil, how's things? We're moving on to Python=3.12 and noticed an issue with pyesgf client that uses MyProxyClient, that buils down to an import issue:

from myproxy.client import MyProxyClient

spits out:

Traceback (most recent call last):
  File "/home/valeriu/ESMValCore/testimp.py", line 1, in <module>
    from myproxy.client import MyProxyClient
  File "/home/valeriu/miniconda3/envs/esmvaltool-fromlock/lib/python3.12/site-packages/myproxy/client/__init__.py", line 44, in <module>
    from myproxy.client.utils.openssl import OpenSSLConfig
  File "/home/valeriu/miniconda3/envs/esmvaltool-fromlock/lib/python3.12/site-packages/myproxy/client/utils/__init__.py", line 11, in <module>
    from six.moves.configparser import SafeConfigParser
ImportError: cannot import name 'SafeConfigParser' from 'configparser' (/home/valeriu/miniconda3/envs/esmvaltool-fromlock/lib/python3.12/configparser.py). Did you mean: 'RawConfigParser'?

I am using six=1.16 and myproxyclient=2.1.0. As far as I can see SafeConfigParse was renamed to ConfigParser many moons ago benjaminp/six#218 but only now it has been completely nuked https://docs.python.org/3/whatsnew/3.12.html - I can open a PR fix this here if you OK with that? Many thanks and cheers 🍺

EDIT: cheers to my bud @bouweandela - he spotted the new source for MyProxyClient, I initially opened philipkershaw#9 in good ole Phil's space, which I will now close