Ncplib

-------------------

- Deprecated ``wait_closed()`` on :class:`Connection`. It's now a no-op, and :meth:`Connection.close()` is sufficient to close the connection.

-------------------

- Fixed IPv6 handling in NCP server.

------------------

- Handling more classes of shutdown errors.

------------------

- Suppressing connection errors in NCP server.

------------------

- Handling more classes of shutdown errors.

------------------

- Handling more classes of client connection error gracefully.
- Handling shutdown of broken connections gracefully.