The --compressor option is not listed in the --help output

Problem Statement/Rationale

There is a hidden option to enable a custom compressor

Steps to Reproduce

Run mongodump --help and observe the absence of the --compressor option in the output

Expected Results

--help output should include --compressor

Actual Results

The output produced by --help does not list --compressor?

Additional Notes

This is problematic as specifying the compressors URI option does not work as expected - see TOOLS-2888