utf8_to_utf7 (t, strlen (t), s, 0);
{ char *u7 = utf8_to_utf7 (t, strlen (t), NULL, 0); FREE (s); *s = u7; }
void imap_utf7_encode (char **s){  if (Charset)  {    char *t = safe_strdup (*s);    if (!mutt_convert_string (&t, Charset, "UTF-8", 0))      utf8_to_utf7 (t, strlen (t), s, 0);    FREE (&t);  }}