add debug API endpoint and signal listener #138
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This PR adds 2 things:
/debugAPI endpoint which toggles blip.Debugging. it returns a string telling you whether it's been enabled or disabled.SIGUSR1that toggles blip.Debugging. this will write to stderr whether it's turned debugging on or off.I figured it might be helpful to support both of these. In a k8s context, it might be more simple to send a signal to the process running in the container than to figure out where its API endpoint is listening.