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1d181e489c
Now it is possible for a reader to subscribe and wait for new events sent to a ring buffer. When new events are written to a ring buffer, the applets that are subscribed are woken up to display new events. For now we only support this with the CLI applet called by "show events" since the I/O handler is indeed a CLI I/O handler. But it's not complicated to add other mechanisms to consume events and forward them to external log servers for example. The wait mode is enabled by adding "-w" after "show events <sink>". An extra "-n" was added to directly seek to new events only.