keep list of active networks in redis

controller/PostgreSQL.cpp

@@ -1714,6 +1714,7 @@ void PostgreSQL::_doRedisUpdate(sw::redis::Transaction &tx, std::string &control
 		};
 		tx.zadd("nodes-online:{"+controllerId+"}", memberId, ts)
 			.zadd("network-nodes-online:{"+controllerId+"}:"+networkId, memberId, ts)
+			.zadd("active-networks:{"+controllerId+"}", networkId, ts)
 			.sadd("network-nodes-all:{"+controllerId+"}:"+networkId, memberId)
 			.hmset("member:{"+controllerId+"}:"+networkId+":"+memberId, record.begin(), record.end());
 	}
@@ -1745,7 +1746,7 @@ void PostgreSQL::_doRedisUpdate(sw::redis::Transaction &tx, std::string &control
 	}
 
 	tx.zremrangebyscore("nodes-online:{"+controllerId+"}", sw::redis::RightBoundedInterval<double>(expireOld, sw::redis::BoundType::LEFT_OPEN));
-
+	tx.zremrangebyscore("active-networks:{"+controllerId}"}", sw::redis::RightBoundedInterval<double>(expireOld, sw::redis::BoundType::LEFT_OPEN));
 	for(const auto &k : keys) {
 		tx.zremrangebyscore(k, sw::redis::RightBoundedInterval<double>(expireOld, sw::redis::BoundType::LEFT_OPEN));
 	}