Adding functionality to PCS

Sent the below to GNN, hopefully it'll make its way into PCS.

def inet_lton(integer):
    return struct.pack(">L",integer)

def inet_ltoa(integer):
    return socket.inet_ntoa(inet_lton(integer))
    
def inet_ntol(byteString):
    return struct.unpack(">L",byteString)[0]

def inet_atol(ipString):
    return inet_ntol(socket.inet_aton(ipString))