[sr-dev] [kamailio/kamailio] ul.dump with huge amount of AoR's (#1513)

[Victor K]

### Description

ul.dump can't work with huge amount of aor  (~40K), it fail with 500, "Internal error creating aor struct". And seems it get and not free'd memory, after some calls kamcmd ul.dump / kamcmd ul.dump brief kamailio stop service with messages:

```
Apr 28 13:36:11 kamailio-c2 kamailio2[49808]: ERROR: <core> [sip_msg_clone.c:498]: sip_msg_shm_clone(): cannot allocate memory
Apr 28 13:36:11 kamailio-c2 kamailio2[49808]: ERROR: dmq [worker.c:164]: add_dmq_job(): error cloning sip message
Apr 28 13:36:11 kamailio-c2 kamailio2[49808]: ERROR: dmq [message.c:67]: dmq_handle_message(): failed to add dmq job
Apr 28 13:36:11 kamailio-c2 kamailio2[49808]: ERROR: <core> [mem/q_malloc.c:292]: qm_find_free(): qm_find_free(0x809132000, 3976); Free fragment not found!
Apr 28 13:36:11 kamailio-c2 kamailio2[49808]: ERROR: <core> [mem/q_malloc.c:425]: qm_malloc(): qm_malloc(0x809132000, 3976) called from core: sip_msg_clone.c: sip_msg_shm_clone(495), module: core; Free fragment not found!
```


### Possible Solutions

Need rewrite ul_rpc_dump() in modules/usrloc/ul_rpc.c to aor-by-aor print.

### Additional Information

  * **Kamailio Version** - output of `kamailio -v`

```
version: kamailio 5.0.0-dev6 (x86_64/freebsd) 9fe51e-dirty
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, FAST_LOCK-ADAPTIVE_WAIT, USE_POSIX_SEM, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, select, kqueue.
id: 9fe51e -dirty
compiled on 10:49:57 Nov 18 2016 with cc 3.4

```

* **Operating System**:

```
FreeBSD kamailio-c2 10.3-STABLE FreeBSD 10.3-STABLE #0 r306194
```


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