mod_list_inactive: Print some usage info when not called with enough arguments
mod_list_inactive: Print some usage info when not called with enough arguments

obelisk21/prosody-modules,vince06fr/prosody-modules,vince06fr/prosody-modules,amenophis1er/prosody-modules,amenophis1er/prosody-modules,syntafin/prosody-modules,syntafin/prosody-modules,vince06fr/prosody-modules,syntafin/prosody-modules,obelisk21/prosody-modules,amenophis1er/prosody-modules,vince06fr/prosody-modules,obelisk21/prosody-modules,amenophis1er/prosody-modules,vince06fr/prosody-modules,obelisk21/prosody-modules,obelisk21/prosody-modules,syntafin/prosody-modules,syntafin/prosody-modules,amenophis1er/prosody-modules