Gradually, all the pioneers of enterprise and urban WiFi are being picked off as WiFi becomes an integral part of the mobile and wireline broadband network. The latest to fall is Xirrus, which has developed dense enterprise WLAN solutions with cloud-based management options. It is to become part of Riverbed Technology, adding more WiFi capabilities to that firm’s software-defined WAN (SDWAN) strategy. This is the latest in a stream of deals which has seen Ruckus acquired by Brocade and now by Arris; Meru by Fortinet; and Aruba by HPE – other WiFi start-ups were snapped up even earlier, including Trapeze by Juniper and, way back in 1999, Aironet by Cisco. Riverbed said the acquisition will enhance its SteelConnect SD-WAN offering,…