Merge pull request #2525 from swansontec/master

RELICENSE: William Swanson

RELICENSE/swansontec.md

+# Permission to Relicense under MPLv2 or any other OSI approved license chosen by the current ZeroMQ BDFL
+
+This is a statement by William Swanson
+that grants permission to relicense its copyrights in the libzmq C++
+library (ZeroMQ) under the Mozilla Public License v2 (MPLv2) or any other
+Open Source Initiative approved license chosen by the current ZeroMQ
+BDFL (Benevolent Dictator for Life).
+
+A portion of the commits made by the Github handle "swansontec", with
+commit author " William Swanson <swansontec@gmail.com>", are copyright of William Swanson.
+This document hereby grants the libzmq project team to relicense libzmq,
+including all past, present and future contributions of the author listed above.
+
+William Swanson
+2017/04/10