### Description
When setting `listen` with `advertise` in the configuration file the advertise
section cannot contain an address that has the string `dns` within it. If at
any point the domain used in advertise contains the three letters consecutively
without being broken by a hypen or a dot it causes the parser to fail, see
logging below.
I tried quoting the string but it didn't seam to parse properly. It
interpenetrated the full thing as the listen address portion.
### Troubleshooting
#### Reproduction
Add any advertise address to the config file with the string dns.
e.g.
```
listen=tcp:127.0.0.1:5060 advertise sip.dns.example.com:5060
```
Also using it in the `advertised_address` section without quotes causes the
error.
```
advertised_address=sip.dns.example.com:5060
```
#### Log Messages
``````
0(98) CRITICAL: <core> [core/cfg.y:3507]: yyerror_at(): parse error in config
file /etc/kamailio/kamailio.cfg, line 62, column 43-45: syntax error
0(98) CRITICAL: <core> [core/cfg.y:3507]: yyerror_at(): parse error in config
file /etc/kamailio/kamailio.cfg, line 62, column 43-45: invalid host or
interface name
0(98) CRITICAL: <core> [core/cfg.y:3507]: yyerror_at(): parse error in config
file /etc/kamailio/kamailio.cfg, line 62, column 43-45: ip address, interface
name or hostname expected
0(98) CRITICAL: <core> [core/cfg.y:3507]: yyerror_at(): parse error in config
file /etc/kamailio/kamailio.cfg, line 62, column 47-54:
ERROR: bad config file (4 errors)
```
### Possible Solutions
A solution could be to use the a `advertised_address` though the cookbook
states that this could be deprecated in future and that the `listen` config
parameter is preferred.
### Additional Information
* **Kamailio Version** - output of `kamailio -v`
```
version: kamailio 5.2.1 (x86_64/linux)
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, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT,
USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_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: unknown
compiled with gcc 6.3.0
```
* **Operating System**:
Running in Debian container image.
```
PRETTY_NAME="Debian GNU/Linux 9 (stretch)"
NAME="Debian GNU/Linux"
VERSION_ID="9"
VERSION="9 (stretch)"
ID=debian
HOME_URL="https://www.debian.org/";
SUPPORT_URL="https://www.debian.org/support";
BUG_REPORT_URL="https://bugs.debian.org/";
Linux 1498e1ef835d 4.20.6-arch1-1-ARCH #1 SMP PREEMPT Thu Jan 31 08:22:01 UTC
2019 x86_64 GNU/Linux
```
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