Fix compiler errors

examples/engine/blocking_server.c

@@ -18,7 +18,7 @@
 #define CLOSE_SOCKET close
 #endif
 
-#include <http.h>
+#include <chttp.h>
 
 // This example showcases how to use the engine interface
 // to build a blocking HTTP server that works on Windows

examples/engine/iocp_server.c

@@ -1,7 +1,7 @@
 #include <winsock2.h>
 #include <ws2tcpip.h>
 #include <mswsock.h>
-#include <http.h>
+#include <chttp.h>
 
 #define MAX_CLIENTS (1<<10)