non-scalar options containing the list of shell commands that are allowed to be executed via allowed_commands is an non-scalar option command. As most of non-scalar options, web_infos cannot be edited or seen from the interface; it can be found in downloads.ini? config file instead.
It is a security feature designed to prevent remote exploitation of local shell through MLdonkey interfaces. Though it is possible to disable it by setting allow_any_command to true, it is highly not recommended.
The commands in this list should have a short execution time, so that the core is not blocked more than necessary.
allowed_commands = [ (df, df); (ls, \"ls incoming\");]