Configuring discovering of disconnected participants

MUC component automatically discovers disconnected participants by checking if user is still connected every 5 minutes.

It is possible to increase checking frequency by setting search-ghosts-every-minute property of MUC component to true

muc () {
    'search-ghosts-every-minute' = trues
}

It is also possible to disable this discovery by setting ghostbuster-enabled property of MUC component to false

muc () {
    'ghostbuster-enabled' = false
}