Update for Net-TS Asio (API Change):

fix #769

The following classes are removed:

* handler_type
* async_result
* async_completion
* is_dynamic_buffer
* is_const_buffer_sequence
* is_mutable_buffer_sequence
* handler_alloc

Actions Required:

* Use BOOST_ASIO_HANDLER_TYPE instead of handler_type
* Use BOOST_ASIO_INITFN_RESULT_TYPE instead of async_result
* Use boost::asio::async_completion
* Use boost::asio::is_dynamic_buffer
* Use boost::asio::is_const_buffer_sequence
* Use boost::asio::is_mutable_buffer_sequence
* boost::asio::associated_allocator_t replaces handler_alloc

example/websocket/server/sync/websocket_server_sync.cpp

@@ -79,18 +79,18 @@ int main(int argc, char* argv[])
                 "    websocket-server-sync 0.0.0.0 8080\n";
             return EXIT_FAILURE;
         }
-        auto const address = boost::asio::ip::address::from_string(argv[1]);
+        auto const address = boost::asio::ip::make_address(argv[1]);
         auto const port = static_cast<unsigned short>(std::atoi(argv[2]));
 
-        // The io_service is required for all I/O
-        boost::asio::io_service ios{1};
+        // The io_context is required for all I/O
+        boost::asio::io_context ioc{1};
 
         // The acceptor receives incoming connections
-        tcp::acceptor acceptor{ios, {address, port}};
+        tcp::acceptor acceptor{ioc, {address, port}};
         for(;;)
         {
             // This will receive the new connection
-            tcp::socket socket{ios};
+            tcp::socket socket{ioc};
 
             // Block until we get a connection
             acceptor.accept(socket);