Implement `action` endpoint where agent sends RTMP stats and waits for action to be taken

[dolftax]

Method: POST
Content-type: application/json
Struct:

type NginxStats struct {
Rtmp struct {
		NginxVersion     string `json:"nginx_version"`
		NginxRtmpVersion string `json:"nginx_rtmp_version"`
		Compiler         string `json:"compiler"`
		Built            string `json:"built"`
		Pid              string `json:"pid"`
		Uptime           string `json:"uptime"`
		Naccepted        string `json:"naccepted"`
		BwIn             string `json:"bw_in"`
		BytesIn          string `json:"bytes_in"`
		BwOut            string `json:"bw_out"`
		BytesOut         string `json:"bytes_out"`
		Server           struct {
			Application struct {
				Name string `json:"name"`
				Live struct {
					Stream []struct {
						Name     string `json:"name"`
						Time     string `json:"time"`
						BwIn     string `json:"bw_in"`
						BytesIn  string `json:"bytes_in"`
						BwOut    string `json:"bw_out"`
						BytesOut string `json:"bytes_out"`
						BwAudio  string `json:"bw_audio"`
						BwVideo  string `json:"bw_video"`
						Client   []struct {
							ID         string `json:"id"`
							Address    string `json:"address"`
							Time       string `json:"time"`
							Flashver   string `json:"flashver"`
							Dropped    string `json:"dropped"`
							Avsync     string `json:"avsync"`
							Timestamp  string `json:"timestamp"`
							Active     string `json:"active"`
							Swfurl     string `json:"swfurl,omitempty"`
							Publishing string `json:"publishing,omitempty"`
						} `json:"client"`
						Meta struct {
							Video struct {
								Width     string `json:"width"`
								Height    string `json:"height"`
								FrameRate string `json:"frame_rate"`
								Codec     string `json:"codec"`
								Profile   string `json:"profile"`
								Compat    string `json:"compat"`
								Level     string `json:"level"`
							} `json:"video"`
							Audio struct {
								Codec      string `json:"codec"`
								Profile    string `json:"profile"`
								Channels   string `json:"channels"`
								SampleRate string `json:"sample_rate"`
							} `json:"audio"`
						} `json:"meta"`
						Nclients   string `json:"nclients"`
						Publishing string `json:"publishing"`
						Active     string `json:"active"`
					} `json:"stream"`
					Nclients string `json:"nclients"`
				} `json:"live"`
			} `json:"application"`
		} `json:"server"`
	} `json:"rtmp"`
	Host string `json:"host"`
}

Expected response:

type Action struct {
	Streams []struct {
		Name   string `json:"name"`
		Action string `json:"action"`
	} `json:"streams"`
}

Only action: drop for now.