Stefan,

To solve the problem I suggest following change to elogd.c (2.7.5 2159).

Create a list of elog cookies, and store only these as parameters. Example diff:

---
$ diff elog/src/elogd.c elogd_niho.c
26557a26558
>    const char *cookie_list[] = { "upwd", "unm", "elmode", "urem", "wpwd", "apwd", "uname", NULL };
26603c26604,26610
<          setparam(str, cookie);
---
>          for(i=0; cookie_list[i]; i++) {
>             if(strcmp(cookie_list[i], str) == 0) {
>                setparam(str, cookie);
>                break;
>             }
>          }
>
---

In a more readable fashion:
int process_http_request(const char *request, int i_conn)
{
...
const char *cookie_list[] = { "upwd", "unm", "elmode", "urem", "wpwd", "apwd", "uname", NULL };
...
...
...
         /* store cookie as parameter */
         for(i=0; cookie_list[i]; i++) {
            if(strcmp(cookie_list[i], str) == 0) {
               setparam(str, cookie);
               break;
            }
         }

...

Not sure if I got all the cookies used by elog.

BR, niklas