Merge pull request cpp-netlib#685 from enricodetoma/master

Fix for issue cpp-netlib#648: cpp-netlib 0.12.0 build error with visual studio 2015 and boost 1.60

Author: deanberris

libs/network/src/server_request_parsers_impl.cpp

@@ -44,9 +44,9 @@ void parse_version(
 
 void parse_headers(
     std::string const& input, std::vector<request_header_narrow>& container) {
-  using namespace boost::spirit::qi;
   u8_to_u32_iterator<std::string::const_iterator> begin = input.begin(),
                                                   end = input.end();
+  using namespace boost::spirit::qi;
   typedef as<boost::spirit::traits::u32_string> as_u32_string;
   parse(begin, end,
         *(+((alnum | punct) - ':') >> lit(": ") >>