rfc822_append (&out->to, in->to);
if(!mutt_addr_is_user(in->to)) rfc822_append (&out->cc, in->to);
static int fetch_recips (ENVELOPE *out, ENVELOPE *in, int flags){  ADDRESS *tmp;  if (flags & SENDLISTREPLY)  {    tmp = find_mailing_lists (in->to, in->cc);    rfc822_append (&out->to, tmp);    rfc822_free_address (&tmp);  }  else  {    if (default_to (&out->to, in, flags & SENDGROUPREPLY) == -1)      return (-1); /* abort */    if ((flags & SENDGROUPREPLY) && !in->mail_followup_to)    {      rfc822_append (&out->to, in->to);      rfc822_append (&out->cc, in->cc);    }  }  return 0;}