4.4.0.0

## 📝 Release Notes

- For many of us, 2020 has been a difficult year. As we pass the end of 2020, many things are still not over yet. But we should all be ready for the opportunities and new challenges 2021 is about to present to us. We are releasing this new version on the first day of 2021. And we wish you a happy new year! 🎆
- Security update: Yes, we have finally removed support for __all stream ciphers__, almost 4 years after the [proposal](https://github.com/shadowsocks/shadowsocks-org/issues/30) of [Shadowsocks AEAD](https://shadowsocks.org/en/wiki/AEAD-Ciphers.html). Stay safe! 🦠
- Prepare to say goodbye to legacy links! When importing servers from pre-SIP002 legacy ss:// links, we will show a warning message to remind you to update your ss:// links. The easiest way to update is to use the server sharing feature.

## 👩‍💻 Changes

- Security: remove infrastructure of stream ciphers (#3048)
- Show warning message when importing from deprecated legacy ss:// links.
- Other minor bug fixes and improvements

## 🐛 Known Issues

- 🎉 All clear.