Problem: no NEWS for 4.2.0

Solution: add an overview of the new socket options, new APIs,
DRAFT mechanism (and DRAFT APIs). And a dedication.

NEWS

+0MQ version 4.2.0 stable, released on 2016/11/xx
+=============================================
+
+* For Pieter. Thanks for making all of this possible.
+
+  "Tell them I was a writer.
+   A maker of software.
+   A humanist. A father.
+   And many things.
+   But above all, a writer.
+   Thank You. :)"
+   - Pieter Hintjens
+
+* This release introduces new APIs, but it is ABI compatible with
+  libzmq 4.1.2 and up.
+
+* Note for ARM and SPARC users: an alignment problem in zmq_msg_t that could in
+  some cases and on some CPUs cause a SIGBUS error was solved, but it requires
+  a rebuild of your application against the 4.2.0 version of include/zmq.h.
+  To clarify, this change does not affect the internals of the library but only
+  the public definition of zmq_msg_t, so there is no ABI incompatibility.
+
+* Security with Curve is now available by default thanks to Tweetnacl sources:
+  https://tweetnacl.cr.yp.to/index.html
+  Libsodium is still fully supported but has to be enabled with the build flag
+  --with-libsodium. Distribution and package maintainers are encouraged to use
+  libsodium so that the security implementation can be audited and maintained
+  separately.
+
+* New Context options:
+  - ZMQ_MAX_MSGSZ
+  See doc/zmq_ctx_set.txt and doc/zmq_ctx_get.txt for details.
+
+* New Socket options:
+  - ZMQ_HANDSHAKE_IVL
+  - ZMQ_SOCKS_PROXY
+  - ZMQ_XPUB_NODROP
+  - ZMQ_BLOCKY
+  - ZMQ_XPUB_MANUAL
+  - ZMQ_XPUB_WELCOME_MSG
+  - ZMQ_STREAM_NOTIFY
+  - ZMQ_INVERT_MATCHING
+  - ZMQ_HEARTBEAT_IVL
+  - ZMQ_HEARTBEAT_TTL
+  - ZMQ_HEARTBEAT_TIMEOUT
+  - ZMQ_XPUB_VERBOSER
+  - ZMQ_CONNECT_TIMEOUT
+  - ZMQ_TCP_MAXRT
+  - ZMQ_THREAD_SAFE
+  - ZMQ_MULTICAST_MAXTPDU
+  - ZMQ_VMCI_BUFFER_SIZE
+  - ZMQ_VMCI_BUFFER_MIN_SIZE
+  - ZMQ_VMCI_BUFFER_MAX_SIZE
+  - ZMQ_VMCI_CONNECT_TIMEOUT
+  - ZMQ_USE_FD
+  See doc/zmq_setsockopt.txt and doc/zmq_getsockopt.txt for details.
+
+* New CURVE helper function to derive z85 public key from secret key:
+    zmq_curve_public
+
+* New cross-platform atomic counter helper functions:
+    zmq_atomic_counter_new, zmq_atomic_counter_set, zmq_atomic_counter_inc,
+    zmq_atomic_counter_dec, zmq_atomic_counter_value, zmq_atomic_counter_destroy
+  See doc/zmq_atomic_*.txt for details.
+
+* New DRAFT APIs early-release mechanism. New APIs will be introduced early
+  in public releases, and until they are stabilized and guaranteed not to
+  change anymore they will be unavailable unless the new build flag
+  --enable-drafts is used. This will allow developers and early adopters to
+  test new APIs before they are finalized.
+  NOTE: as the name implies, NO GUARANTEE is made on the stability of these APIs.
+  They might change or disappear entirely. Distributions are recommended NOT to
+  build with them.
+
+  New socket types have been introduced in DRAFT state:
+    ZMQ_SERVER, ZMQ_CLIENT, ZMQ_RADIO, ZMQ_DISH, ZMQ_GATHER, ZMQ_SCATTER,
+    ZMQ_DGRAM
+  All these sockets are THREAD SAFE, unlike the existing socket types. They do
+  NOT support multipart messages (ZMQ_SNDMORE/ZMQ_RCVMORE).
+  All these sockets minus ZMQ_SERVER and ZMQ_CLIENT also support UDP as transport.
+  New methods to support the new socket types functionality:
+    zmq_join, zmq_leave, zmq_msg_set_routing_id, zmq_msg_routing_id,
+    zmq_msg_set_group, zmq_msg_group
+  See doc/zmq_socket.txt for more details.
+
+  New poller mechanism and APIs have been introduced in DRAFT state:
+    zmq_poller_new, zmq_poller_destroy, zmq_poller_add, zmq_poller_modify,
+    zmq_poller_remove, zmq_poller_wait, zmq_poller_wait_all, zmq_poller_add_fd
+    zmq_poller_modify_fd, zmq_poller_remove_fd
+  and a new supporting struct typedef: zmq_poller_event_t
+  They support existing socket type, new thread-safe socket types and file
+  descriptors (cross-platform).
+  Documentation will be made available in the future before these APIs are declared
+  stable.
+
+  New cross-platform timers helper functions have been introduced in DRAFT state:
+    zmq_timers_new, zmq_timers_destroy, zmq_timers_add, zmq_timers_cancel,
+    zmq_timers_set_interval, zmq_timers_reset, zmq_timers_timeout,
+    zmq_timers_execute
+  and a new supporting callback typedef: zmq_timer_fn
+
+* Many, many bug fixes. The most important fixes are backported and captured in the
+  4.1.x and 4.0.x changelogs.
+
+
 0MQ version 4.2.0 rc1, released on 2016/11/01
 =============================================