fix(userspace): fix broken outputs when using -d daemonize option

Symptoms included the message queue filling up without popping any messages
even though events were handled normally.

Signed-off-by: Melissa Kilby <melissa.kilby.oss@gmail.com>

userspace/falco/app/actions/daemonize.cpp

@@ -43,7 +43,7 @@ falco::app::run_result falco::app::actions::daemonize(falco::app::state& s)
 			// error
 			return run_result::fatal("Could not fork");
 		} else if (pid > 0) {
-			// parent. Write child pid to pidfile and exit
+			// parent. Write child pid to pidfile.
 			std::ofstream pidfile;
 			pidfile.open(s.options.pidfilename);
 
@@ -54,11 +54,10 @@ falco::app::run_result falco::app::actions::daemonize(falco::app::state& s)
 			}
 			pidfile << pid;
 			pidfile.close();
-			exit(0);
 		}
 		// if here, child.
 
-		// Become own process group.
+		// Become own session.
 		sid = setsid();
 		if (sid < 0) {
 			return run_result::fatal("Could not set session id");