Pbs_snapshot: Add the ability to obfuscate existing snapshots

Hi,

I’m proposing a new option to pbs_snapshot called “–obf-snap”. Here’s the design page for it:
https://openpbs.atlassian.net/wiki/spaces/PD/pages/2732032016/pbs+snapshot+Add+the+ability+to+obfuscate+existing+snapshots

Please provide feedback. Thanks!

Very useful and looks good, thanks!