@mgentili: The value to the left of `=` isn't used, and `*` evaluates to the next sequential number. See: https://twitter.com/SaraMG/status/438824127278108673

As for the path itself, it can either be relative to the extension directory or absolute. In that case, I don't think we want to use `/mongoExtension.so` here, since that would imply that the file is in the top level of the root filesystem.