Issue description

The Python documentation states

A class that overrides __eq__() and does not define __hash__() will have its __hash__() implicitly set to None. When the __hash__() method of a class is None, instances of the class will raise an appropriate TypeError when a program attempts to retrieve their h

The ssh configuration can be as follows:

# Github
Host github.com
    User git
    HostName github.com
    IdentityFile ~/.ssh/id_rsa_gitall
    ProxyCommand socat - PROXY:<proxy>:%h:%p,proxyport=<port>

# Gitlab
Host gitlab.com
    User git
    HostName altssh.gitlab.com
    Port 443
    IdentityFile ~/.ssh/id_rsa_gitall
    ProxyCommand socat - PROXY:<proxy>:%h:%p,proxyport=

We currently don't check whether we add any new deprecations with the nasty hacks we do to workaround caching problems. We should at least check and fail the test if a new deprecation is caused. We should require a deprecation to be explicitly accepted if it's the only way to work around an issue.

Probably should be a lower priority until someone from outside of openSUSE starts to contribute and maybe just maybe Valve with take the fix upstream before then.

This is a great little utility and I hope it is able to be maintained.

As you have probably noticed at pypa/pip#3813 there was a big issue around the message which should be shown to the user, regardless of what changes might be made.

Unfortunately I think pybin retains some of these issues of documentation and understandability in terms of the guidance and messag