The censorArgvArray in 

https://github.com/mongodb/mongo/blob/4ca2f9fe5a11855510d0f69bc863f17c14580a5a/src/mongo/util/cmdline_utils/censor_cmdline.h#L44

censorArgvArray(int argc, char** argv);

is meant to overwrite argv to hide command-line secrets from `ps` or `/proc` traversal.

But on Windows, the argv we give is not the real argvW. It's a copy, so modifying it has no effect.

Windows processes have a special undocumented PEB block that may need to be modified to do the censoring properly.