Merge pull request #2399 from sappo/master

RELICENSE: Kevin Sapper grant

RELICENSE/kevinsapper.md

+# Permission to Relicense under MPLv2
+
+This is a statement by Kevin Sapper that grants permission to relicense its
+copyrights in the libzmq C++ library (ZeroMQ) under the Mozilla Public License
+v2 (MPLv2).
+
+A portion of the commits made by the Github handle "sappo", with commit author
+"Kevin Sapper <mail@kevinsapper.de>", are copyright of Kevin Sapper. This document hereby grants the
+libzmq project team to relicense libzmq, including all past, present and future
+contributions of the author listed above.
+
+Kevin Sapper
+2017/03/20