[sr-dev] [kamailio/kamailio] TLSA Undefined Symbol __dlclose (#2815)

[Tim Chubb]

### Description
Building TLSA module on ubuntu 18.04 results in a compiler warning and an undefined symbol error when attempting to load module.

### Troubleshooting

#### Reproduction
Make module and attempt to load it
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#### Debugging Data

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```
N/A
```

#### Log Messages

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Compiler output
```
CC (gcc) [M tlsa.so]            tls_util.o
CC (gcc) [M tlsa.so]            tls_domain.o
CC (gcc) [M tlsa.so]            tls_locking.o
CC (gcc) [M tlsa.so]            tls_rand.o
CC (gcc) [M tlsa.so]            tls_map.o
CC (gcc) [M tlsa.so]            tls_cfg.o
CC (gcc) [M tlsa.so]            tls_select.o
CC (gcc) [M tlsa.so]            tls_server.o
CC (gcc) [M tlsa.so]            tls_dump_vf.o
CC (gcc) [M tlsa.so]            tls_init.o
CC (gcc) [M tlsa.so]            tls_rpc.o
CC (gcc) [M tlsa.so]            tls_config.o
CC (gcc) [M tlsa.so]            tls_bio.o
CC (gcc) [M tlsa.so]            tls_ct_wrq.o
CC (gcc) [M tlsa.so]            tlsa_mod.o
CC (gcc) [M tlsa.so]            tls_verify.o
LD (gcc) [M tlsa.so]            tlsa.so
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/libcrypto.a(dso_dlfcn.o): In function `dlfcn_globallookup':
(.text+0x11): warning: Using 'dlopen' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
```

Kamailio Log
```
Aug  9 11:21:04 kamtest kamailio: ERROR: <core> [core/sr_module.c:570]: load_module(): could not open module </usr/local/lib64/kamailio/modules/tlsa.so>: /usr/local/lib64/kamailio/modules/tlsa.so: undefined symbol: __dlclose
Aug  9 11:21:04 kamtest kamailio: CRITICAL: <core> [core/cfg.y:3683]: yyerror_at(): parse error in config file /etc/kamailio/parameters/modules.cfg, line 7, column 12-20: failed to load module
Aug  9 11:21:04 kamtest kamailio: ERROR: <core> [core/modparam.c:181]: set_mod_param_regex(): No module matching <tlsa> found
```

#### SIP Traffic

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```
N/A
```

### Possible Solutions

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### Additional Information

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

```
version: kamailio 5.6.0-dev0 (x86_64/linux) 0a5307-dirty
flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, 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_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
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: 0a5307 -dirty
compiled on 10:36:16 Aug  9 2021 with gcc 7.5.0
```

* **Operating System**:

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```
Linux kamtest 4.15.0-144-generic #148-Ubuntu SMP Sat May 8 02:33:43 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
```


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