auto startup zabbix agent on Mac OS X (macports)

org.macports.zabbix_agent.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
        <key>Label</key>
        <string>org.macports.zabbix_agent</string>

        <key>ProgramArguments</key>
        <array>
                <string>/opt/local/share/zabbix/zabbix_agentd.init</string>
                <string>start</string>
        </array>

        <key>OnDemand</key>     <false />
        <key>Disabled</key>     <true/>
</dict>
</plist>

save to /Library/LaunchAgents/org.macports.zabbix_agent.plist

and

sudo launchctl load -w /Library/LaunchAgents/org.macports.zabbix_agent.plist