schneuwlym created an issue (kamailio/kamailio#4173)

### Description

The output of `kamcmd dns.view` shows two times the parameter `rr_regexp`, but `rr_replacement` is missing.

### Troubleshooting

#### Reproduction

Lookup a NAPTR record with `kamcmd dns.lookup NAPTR ...` and check the output ``` # kamcmd dns.lookup NAPTR test.example.com { name: test.example.com type: NAPTR size_bytes: 328 reference_counter: 2 permanent: no expires: 300 last_used: 0 negative_entry: no records: { { rr_idx: 0 rr_order: 10 rr_preference: 10 rr_flags: S rr_service: SIPS+D2T -> rr_regexp: -> rr_regexp: _sips._tcp.test.example.com rr_permanent: no rr_expires: 300 } { rr_idx: 1 rr_order: 20 rr_preference: 10 rr_flags: S rr_service: SIP+D2U -> rr_regexp: -> rr_regexp: _sip._udp.test.example.com rr_permanent: no rr_expires: 300 } } }

```

### Possible Solutions

**Change is untested!**

```patch diff --git a/src/core/dns_cache.c b/src/core/dns_cache.c index 1507e89015..65445fcf8f 100644 --- a/src/core/dns_cache.c +++ b/src/core/dns_cache.c @@ -3921,7 +3921,7 @@ int dns_cache_print_entry(rpc_t *rpc, void *ctx, struct dns_hash_entry *e) } s.s = ((struct naptr_rdata *)(rr->rdata))->repl; s.len = ((struct naptr_rdata *)(rr->rdata))->repl_len; - if(rpc->struct_add(sh, "S", "rr_regexp", &s) < 0) { + if(rpc->struct_add(sh, "S", "rr_replacement", &s) < 0) { rpc->fault(ctx, 500, "Internal error adding naptre rr_replacement"); return -1;

```

### Additional Information

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

``` version: kamailio 5.8.4 (x86_64/linux) f1d83d flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, MEM_JOIN_FREE, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST, HAVE_RESOLV_RES ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_SEND_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: f1d83d ```