func RegisterPushEventHandler(name string, fn PushEventHandler, help HelpProvider) {
	pluginHelp[name] = help
	pushEventHandlers[name] = fn
}
func RegisterPushEventHandler(name string, fn PushEventHandler, help HelpProvider) {
	pluginHelp[name] = help
	pushEventHandlers[name] = fn
}
// RegisterPushEventHandler registers a plugin's github.PushEvent handler.