rem: void swapEndian(QString &str)
add: static void swapEndian(QString &str)
context: void swapEndian(QString &str){  ushort us;  uint len = str.length();  for (uint i = 0; i < len; i++)  {    us = str[i].unicode();    str[i] = QChar(kmail_swap_16(us));  }}