[SR-Users] signal 15 received and .. on Kamailio 5.1.6

Hi, I just installed Kamailio 5.1.6 on Ubuntu 18.04. Starting Kamailio with the default config will give us the following in the log. Is this normal? Is there a way to fix this issue? Thanks, AL Nov 15 14:01:59 lab-proxy03 kamailio[13544]:  * Stopping Kamailio SIP Server: kamailio Nov 15 14:01:59 lab-proxy03 /usr/local/sbin/kamailio[5182]: NOTICE: <core> [main.c:692]: handle_sigs(): Thank you for flying kamailio!!! Nov 15 14:01:59 lab-proxy03 /usr/local/sbin/kamailio[5213]: INFO: <core> [main.c:819]: sig_usr(): signal 15 received Nov 15 14:01:59 lab-proxy03 /usr/local/sbin/kamailio[5212]: INFO: <core> [main.c:819]: sig_usr(): signal 15 received .... Nov 15 14:01:59 lab-proxy03 /usr/local/sbin/kamailio[5182]: INFO: <core> [core/sctp_core.c:53]: sctp_core_destroy(): SCTP API not initialized Nov 15 14:02:00 lab-proxy03 kamailio[13544]:    ...done. Nov 15 14:02:00 lab-proxy03 kamailio[13556]:  * Starting Kamailio SIP Server: kamailio Nov 15 14:02:00 lab-proxy03 kamailio: INFO: <core> [core/sctp_core.c:74]: sctp_core_check_support(): SCTP API not enabled - if you want to use it, load sctp module Nov 15 14:02:00 lab-proxy03 kamailio: INFO: <core> [core/tcp_main.c:4721]: init_tcp(): using epoll_lt as the io watch method (auto detected) .... Nov 15 14:02:00 lab-proxy03 /usr/local/sbin/kamailio[13596]: INFO: rr [../outbound/api.h:52]: ob_load_api(): unable to import bind_ob - maybe module is not loaded Nov 15 14:02:00 lab-proxy03 /usr/local/sbin/kamailio[13596]: INFO: rr [rr_mod.c:175]: mod_init(): outbound module not available Nov 15 14:02:00 lab-proxy03 /usr/local/sbin/kamailio[13596]: INFO: <core> [core/udp_server.c:153]: probe_max_receive_buffer(): SO_RCVBUF is initially 212992 Nov 15 14:02:00 lab-proxy03 /usr/local/sbin/kamailio[13596]: INFO: <core> [core/udp_server.c:205]: probe_max_receive_buffer(): SO_RCVBUF is finally 425984 Nov 15 14:02:00 lab-proxy03 /usr/local/sbin/kamailio[13596]: INFO: <core> [core/udp_server.c:153]: probe_max_receive_buffer(): SO_RCVBUF is initially 212992 Nov 15 14:02:00 lab-proxy03 /usr/local/sbin/kamailio[13596]: INFO: <core> [core/udp_server.c:205]: probe_max_receive_buffer(): SO_RCVBUF is finally 425984 Nov 15 14:02:00 lab-proxy03 /usr/local/sbin/kamailio[13618]: INFO: jsonrpcs [jsonrpcs_sock.c:443]: jsonrpc_dgram_process(): a new child 0/13618 Nov 15 14:02:00 lab-proxy03 /usr/local/sbin/kamailio[13619]: INFO: ctl [io_listener.c:214]: io_listen_loop(): io_listen_loop:  using epoll_lt io watch method (config) Nov 15 14:02:00 lab-proxy03 kamailio[13556]:    ...done.