### Description

Using kamcmd to obtain statistics of SIP replies, for large values (exceeding 4 bytes) : Example :

``` kamcmd> sl.stats { (...) 302: -1294967293 } ```

The variable is an unsigned long, it can store values up to 2^64-1. But RPC command **sl.stats** does not support this.

### Possible Solutions

I think the fix is simple, we should just replace "d" by "j" when using "rpc->struct_add" (function "rpc_stats" in file src/modules/sl/sl_stats.c).

E.g. :

``` rpc->struct_add(st, "jjjj", "300", total.err[RT_300], "301", total.err[RT_301], "302", total.err[RT_302], "3xx", total.err[RT_3xx]); ```

I found a commit that did something similar with the shared memory stats : https://github.com/kamailio/kamailio/commit/f619cae55ffeb4596da852d9ed75773c...

### Additional Information

Kamailio 5.6.4