server: Implement service_name=all

server/api.go

@@ -52,6 +52,9 @@ func dayHistory(w http.ResponseWriter, req *http.Request) {
 			return
 		}
 	}
+	if service_name == "all" {
+		service_name = ""
+	}
 	entries := db.GetFromDB(service_name, time.Now().Add(time.Duration(-24)*time.Hour), time.Now())
 	if interval == 1 {
 		writeJSON(w, entries)