- Show the host name in the error message in case of name resolution error
  (:ticket:`#1205`).
- Fix `Cursor.copy()` and `AsyncCursor.copy()` to hold the connection lock
  for the entire operation, preventing concurrent access issues (:ticket:`#1210`).
- Fix GSSAPI check with C extension built with libpq < v16 (:ticket:`#1216`).