adding cmdline procstat

[scottprichard]

closes #1873

Required for all PRs:

• Signed CLA.
• Associated README.md updated.
• Has appropriate unit tests.

[scottprichard]

pulled master in...same thing as:
Added Cmdline to procstat #3131
@danielnelson / @glinton

[scottprichard]

ready to merge, would be nice to get someone with write access to review this and merge it in

[scottprichard]

@danielnelson 🙏

[glinton]

Thanks

[danielnelson]

PR is good but I am a little nervous about this value due to the potential length and contents of this data. Let's do as suggested in #1873 (comment) and add a new option that, when enabled, will add this data as a tag. The option would be disabled by default.

## When true add the full cmdline as a tag.
# cmdline_tag = false

Also make sure to update the README to list the new item.

[scottprichard]

@danielnelson can you review ?

[danielnelson]

Great, thank you!

[scottprichard]

@danielnelson not in 1.10.3 ? when can I expect 1.11.0 to be cut ? or can this get put into the next minor ?

[danielnelson]

1.11 should be released near the beginning of June, this isn't something we would put into a patch release but it should be easy to create a custom package with docker or you can use one of the nightly builds