feat: Add email config for Nanjing University

[SuperKenVery]

No description provided.

[babolivier]

Hey @SuperKenVery, thanks for this PR!

The change itself looks good to me, but before we merge it I wanted to ask, are you involved with infrastructure maintenance for Nanjing University? Generally speaking we prefer when the provider host the autoconfig file themselves, as a way to ease maintenance on both ends. See https://github.com/thunderbird/autoconfig/wiki/The-autoconfig-file

If you do not work for Nanjing University's infrastructure team, would you be open to reaching out to them to find out whether hosting this configuration file is something they'd be interested in?

In both cases, feel free to loop me into the conversation (brendan [at] thunderbird.net) if there's anything I can help with 🙂

[SuperKenVery]

That's a good idea!

Unfortunately I'm just a student in NJU, but I do have some ways to reach out to the maintenance team. It's late night here now, I'll try and come back with my progress later 😉