How to access a website with multiple virtual hosts from Arduino Ethernet Shield

ethernet.c

#include <SPI.h>
#include <Ethernet.h>

// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[]            = {  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
byte ip[]             = { 192, 168,   6,  30 };

byte server[]         = { ***, ***, 168,  16 }; // Your VPS

// Initialize the Ethernet client library
// with the IP address and port of the server
// that you want to connect to (port 80 is default for HTTP):
Client client(server, 80);

String response = "";

void setup() {
  Ethernet.begin(mac, ip);
  Serial.begin(9600);
  // Give the Ethernet shield a second to initialize
  delay(1000);
  Serial.println("Connecting...");
}

void loop() {
  if (!client.available() &amp;&amp; client.connect()) {
    Serial.println("-- Connected");
    // Make a HTTP request:
    client.println("GET /bot HTTP/1.0");
    client.println("Host: example.com");
    client.println("User-Agent: Arduino/Shishir (mail.mastermind [at] gmail.com)");
    client.println();
  }
  if (client.available()) {
    char c = client.read();
    response.concat(c);
  }
  if(!client.connected()){
    process(response);
    //Serial.print(response);
  }
  if (!client.connected() &amp;&amp; reset == 1) {
    Serial.println("disconnecting.");
    client.stop();
    response = "";
    delay(1000*10);
  }
}
void process(String response) {
  Serial.println(response);
}