### Description

Hello, Loading http_async_client module causes kamailio to crash on startup with the following errors:

0(60541) INFO: http_async_client [async_http.c:85]: async_http_init_worker(): started worker process: 1 [warn] kevent: Bad file descriptor 16(60557) CRITICAL: <core> [core/pt.c:405]: fork_tcp_process(): called from a non "main" process 16(60557) ERROR: <core> [core/tcp_main.c:5121]: tcp_init_children(): fork failed: Bad file descriptor 0(60541) ALERT: <core> [main.c:786]: handle_sigs(): child process 60557 exited normally, status=255 0(60541) INFO: <core> [main.c:813]: handle_sigs(): terminating due to SIGCHLD 1(60542) INFO: <core> [main.c:868]: sig_usr(): signal 15 received 5(60546) INFO: <core> [main.c:868]: sig_usr(): signal 15 received

Issue reproduced with kamailio sample configuration + loadmodule "http_async_client.so"

### Additional Information

* **Kamailio Version** * ``` kamailio -v version: kamailio 5.5.3 (x86_64/darwin) b42dfd flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, 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, select, kqueue. id: b42dfd compiled on 22:25:21 Jan 6 2022 with gcc Apple clang version 13.0.0 (clang-1300.0.29.30) ```

* **Operating System**:

``` MacOS ```