Persistent Connection: waitForHttpBreak
Waits until an HTTP breakpoint has been hit, at which point it returns the message. Poll is the number of milliseconds ZAP will pause between checking for breakpoints being hit (default 500). If keepalive is zero or less then the response will be returned as a Server Sent Event, otherwise it is used as the frequency in seconds at which 'keepalive' events should be returned and the response is sent as a standard response.