Log Message:
Update to zeromq version 4.1.3, currently latest stable release.

Pkgsrc changes:
 * Adapt PLIST

Upstream changes:

0MQ version 4.1.3 stable, released on 2015/08/17
* Fixed #1532 - getsockopt ZMQ_RCVMORE now resets all bits instead of only 32
* Fixed #1445 - zmq::socket_base_t::connect fails on tcp ipv6 address

0MQ version 4.1.2 stable, released on 2015/06/15
* Added explicit reference to static link exception in every source file.
* Bumped ABI version to 5:0:0 since 4.1.x changed the ABI.
* Fixed STDINT event interface macros to work with CZMQ 3.0.
* Fixed installation of man pages when BUILD_DOC is not set.
* Fixed #1428 - regression on single-socket proxies.

0MQ version 4.1.1 stable, released on 2015/06/02
* Fixed #1208 - fix recursion in automake packaging.
* Fixed #1224 - crash when processing empty unsubscribe message.
* Fixed #1213 - properties files were missing from source packages.
* Fixed #1273 - V3 protocol handler vulnerable to downgrade attacks.
* Fixed #1347 - lack way to get peer address.
* Fixed #1362 - SUB socket sometimes fails to resubscribe properly.
* Fixed #1377, #1144 - failed with WSANOTINITIALISED in some cases.
* Fixed #1389 - PUB, PUSH sockets had slow memory leak.
* Fixed #1382 - zmq_proxy did not terminate if there were no readers.

0MQ version 4.0.8 stable, released on 2015/07/xx
* Fixed LIBZMQ-949 - zmq_unbind fails for inproc and wildcard endpoints

0MQ version 4.0.7 stable, released on 2015/06/15
* Fixed #1428 - regression on single-socket proxies.

0MQ version 4.0.6 stable, released on 2015/06/02
* Fixed #1273 - V3 protocol handler vulnerable to downgrade attacks.
* Fixed #1362 - SUB socket sometimes fails to resubscribe properly.
* Fixed #1377, #1144 - failed with WSANOTINITIALISED in some cases.
* Fixed #1389 - PUB, PUSH sockets had slow memory leak.
* Fixed #1382 - zmq_proxy did not terminate if there were no readers.