http://nkuz2tpok7ctwd5ueer5bytj3bm42vp7lgjcsnznal3stotg6vyaakyd.onion/rbm_config.html
When reading
a configuration file, rbm will read all documents contained in the
file, and for each of them will : if the document is a hash, use it as configuration if the document is a string, evaluate it as perl, and get the return
value as as hash containing configuration If multpiple documents define the same options, the value from the last
one override the values from previous documents.