radicale can't start

Hello,

I noticed since 7.7 upgrade that radicale fails to start.

I tried to run it manually, then I see this message:

```
[a5719463ff8] ERROR: An exception occurred during server startup: module 'ssl' has no attribute 'wrap_socket'
ERROR:radicale:An exception occurred during server startup: module 'ssl' has no attribute 'wrap_socket'
```

It seems there are deprecated modules, but maybe I'm wrong?

Regards.

prx