Problem: copyright years out of date

bluca · bluca · commit d9f0f016c070 · 2017-07-31T14:30:55.000+01:00
Solution: update them
List the ZeroMQ community as a shorthand for the full list of authors
as it can be found via git log
diff --git a/zmq.hpp b/zmq.hpp
@@ -1,4 +1,5 @@
 /*
+    Copyright (c) 2016-2017 ZeroMQ community
     Copyright (c) 2009-2011 250bpm s.r.o.
     Copyright (c) 2011 Botond Ballo
     Copyright (c) 2007-2009 iMatix Corporation
diff --git a/zmq_addon.hpp b/zmq_addon.hpp
@@ -1,4 +1,5 @@
 /*
+    Copyright (c) 2016-2017 ZeroMQ community
     Copyright (c) 2016 VOCA AS / Harald Nøkland
 
     Permission is hereby granted, free of charge, to any person obtaining a copy

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,5 @@`
`1`	`1`	`/*`
	`2`	`+ Copyright (c) 2016-2017 ZeroMQ community`
`2`	`3`	`Copyright (c) 2009-2011 250bpm s.r.o.`
`3`	`4`	`Copyright (c) 2011 Botond Ballo`
`4`	`5`	`Copyright (c) 2007-2009 iMatix Corporation`