Updated NEWS for 4.0.1

NEWS

@@ -1,5 +1,5 @@
-0MQ version 4.0.1 (RC2), released on 2013/
+0MQ version 4.0.1 stable, released on 2013/10/08
-===============================================
+================================================
 
 Bug fixes
 ---------
@@ -8,8 +8,35 @@ Bug fixes
 
 * Updated CURVE mechanism to track revised RFC 27 (INITIATE vouch).
 
-* Fixed LIBZMQ-566 (dealer-to-router connections sometimes failing).
+  The INITIATE command vouch box is Box[C',S](C->S') instead of
+  Box[C'](C->S), to reduce the risk of client impersonation, as per
+  https://codesinchaos.wordpress.com/2012/09/09/curvecp-1/.
 
+* Fixed LIBZMQ-565, typo in code.
+
+* Fixed LIBZMQ-566, dealer-to-router connections sometimes failing.
+
+* Fixed LIBZMQ-567, adding abstract namespaces for IPC sockets on Linux.
+
+  Converts an initial strudel or "at sign" (@) in the Unix socket path to
+  a NULL character ('\0') indicating that the socket uses the abstract
+  namespace instead of the filesystem namespace.  For instance, binding a
+  socket to 'ipc://@/tmp/tester' will not create a file associated with
+  the socket whereas binding to 'ipc:///tmp/tester' will create the file
+  /tmp/tester. See issue 567 for more information.
+
+* Fixed builds for AIX, MSVC 2008, OS/X with clang++, Solaris.
+
+* Added zmq_z85_encode and zmq_z85_decode to core libzmq API.
+
+* Added zmq_curve_keypair to core libzmq API.
+
+* Improved CURVE handshake error handling.
+
+* Replaced macro constants in zmq.h with enum types for user-facing
+  constants (except ZMQ version numbers).
+
+* Bumped library ABI version to 4:0:1.
 
 0MQ version 4.0.0 (RC1), released on 2013/09/20
 ===============================================