message: Update debian/changelog (v1.9.1)
diff: +shadowsocks-rust (1.9.0) unstable; urgency=medium
  +
  + ## BUG Fixes
  +
  + * #431 UdpSocket::from_std requires sockets to be non-blocked.
  +
  + ## Features
  +
  + * Removed avx from the default CPU features
  +
  + -- Y. T. Chung <zonyitoo@gmail.com> Fri, 26 Feb 2021 19:01:06 +0800
  +
  shadowsocks-rust (1.9.0) unstable; urgency=medium
  Complete refactored the whole implementation and splits into 3 different crates:
  