'Create a static disco interface. Sets of disco#info and
disco#items are maintained for every given JID and node
combination. These stanzas are used to store disco
information in memory without any additional processing.
Arguments:
xmpp -- The main SleekXMPP object.'

def __init__(self, xmpp, disco):

    self.nodes = {}
    self.xmpp = xmpp
    self.disco = disco
    self.lock = threading.RLock()
