add blacklist for magic commands, since some break the kernel #17
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There are magic commands, that break the kernel since they are doing things that are not supposed to be serialized. E.g.
%lsmagiccreates some internal module and opens some sockets that are not serializable. Thus, beside the whitelist for magic commands to parse the user defs, we need a blacklist for magic commands, the kernel shouldn't execute that and a message is promted to the user.Before merging, we should check further magic commands.