Restoring zmq_utils.h from previous version

I hope restoring this from a previous version doesn't do any damage, it
is missing in the current version of this repository and is vital for
the lib to compile anywhere.

builds/msvc/vs2015/libzmq/libzmq.vcxproj.filters

@@ -241,15 +241,21 @@
     <ClCompile Include="..\..\..\..\src\socket_poller.cpp">
       <Filter>src</Filter>
     </ClCompile>
-    <ClCompile Include="..\..\..\..\src\dish.cpp" />
-    <ClCompile Include="..\..\..\..\src\radio.cpp" />
-    <ClCompile Include="..\..\..\..\src\timers.cpp" />
     <ClCompile Include="..\..\..\..\src\udp_address.cpp">
       <Filter>src</Filter>
     </ClCompile>
     <ClCompile Include="..\..\..\..\src\udp_engine.cpp">
       <Filter>src</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\src\dish.cpp">
+      <Filter>src</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\src\radio.cpp">
+      <Filter>src</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\src\timers.cpp">
+      <Filter>src</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\..\..\include\zmq_utils.h">
@@ -531,15 +537,21 @@
     <ClInclude Include="..\..\..\..\src\decoder_allocators.hpp">
       <Filter>src\include</Filter>
     </ClInclude>
-    <ClInclude Include="..\..\..\..\src\dish.hpp" />
-    <ClInclude Include="..\..\..\..\src\radio.hpp" />
-    <ClInclude Include="..\..\..\..\src\timers.hpp" />
     <ClInclude Include="..\..\..\..\src\udp_address.hpp">
       <Filter>src\include</Filter>
     </ClInclude>
     <ClInclude Include="..\..\..\..\src\udp_engine.hpp">
       <Filter>src\include</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\src\dish.hpp">
+      <Filter>src\include</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\..\src\radio.hpp">
+      <Filter>src\include</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\..\src\timers.hpp">
+      <Filter>src\include</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <Filter Include="include">

include/zmq_utils.h

@@ -0,0 +1,30 @@
+/*
+    Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
+
+    This file is part of libzmq, the ZeroMQ core engine in C++.
+
+    libzmq is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License (LGPL) as published
+    by the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    As a special exception, the Contributors give you permission to link
+    this library with independent modules to produce an executable,
+    regardless of the license terms of these independent modules, and to
+    copy and distribute the resulting executable under terms of your choice,
+    provided that you also meet, for each linked independent module, the
+    terms and conditions of the license of that module. An independent
+    module is a module which is not derived from or based on this library.
+    If you modify this library, you must extend this exception to your
+    version of the library.
+
+    libzmq is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+    License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*  This file is deprecated, and all its functionality provided by zmq.h     */