Method unshift

java/com/jcraft/jsch/Packet.java:102–111

(byte command, int recipient, int s, int len)

    return s;
  }
  void unshift(byte command, int recipient, int s, int len){
    System.arraycopy(buffer.buffer, 
		     s, 
		     buffer.buffer, 5+9, len);
    buffer.buffer[5]=command;
    buffer.index=6;
    buffer.putInt(recipient);
    buffer.putInt(len);
    buffer.index=len+5+9;
  }
  Buffer getBuffer(){
    return buffer;
  }