Comment 3 for bug 957787

Tested with the latest Percona Toolkit and works as expected, it goes to the background.

# pt-heartbeat --user=root --create-table -D percona --table heartbeat --update -h 127.0.0.1 --interval 10 --sentinel /tmp/pt-heartbeat-sentinel --stop --daemonize
Successfully created file /tmp/pt-heartbeat-sentinel
# ps aux | grep pt-heartbeat
root 8240 0.0 0.3 80196 13536 ? Ss 12:37 0:00 perl /usr/bin/pt-heartbeat --user=root --create-table -D percona --table heartbeat --update -h 127.0.0.1 --interval 10 --sentinel /tmp/pt-heartbeat-sentinel --stop --daemonize