Install signal handlers before processing config

It's easier to troubleshoot vty-related issues when we can send signals
to obtain talloc report.

Change-Id: I6dd1ad55a227db08595d844008be86f648fa92c1
diff --git a/src/osysmon_main.c b/src/osysmon_main.c
index eb4f50b..91d5039 100644
--- a/src/osysmon_main.c
+++ b/src/osysmon_main.c
@@ -210,6 +210,10 @@
 	ping_init = osysmon_ping_init();
 	osysmon_file_init();
 
+	signal(SIGUSR1, &signal_handler);
+	signal(SIGUSR2, &signal_handler);
+	osmo_init_ignore_signals();
+
 	rc = vty_read_config_file(cmdline_opts.config_file, NULL);
 	if (rc < 0) {
 		fprintf(stderr, "Failed to parse the config file %s\n",
@@ -217,10 +221,6 @@
 		exit(2);
 	}
 
-	signal(SIGUSR1, &signal_handler);
-	signal(SIGUSR2, &signal_handler);
-	osmo_init_ignore_signals();
-
 	if (cmdline_opts.daemonize) {
 		rc = osmo_daemonize();
 		if (rc < 0) {