fix: DEBUG harmony

[erights]

closes: #8096

Updates agoric-sdk to use the new conveniences exported by @endo/env-options.

Reform the contents of the DEBUG environment variable, i.e., the process.env.DEBUG option to be a better behaved list for agoric:* options. See the new docs/env.md for details.

NOTE: This reform of the meaning of the agoric:* members of the DEBUG list is in theory a compat issue. But because we have no known occurrences of that, and it would only affect debugging and logging behavior anyway, we do not flag this PR as a breaking change.

[erights]

See also nodejs/node#48890

[michaelfig]

nvm my earlier (deleted) comment about the CI failure. It seems a perfect specimen of the #endo-branch: failures we were seeing on other PRs, so I will try to fix it in this PR.

[erights]

Hi @michaelfig , this is Ready for Review.

[erights]

@michaelfig , could you take a look at the failing integration tests? Thanks.

[michaelfig]

could you take a look at the failing integration tests?

This has been bumped up in my queue. I ground to a halt the last time I tried; with fresh eyes I should get it done this week.

[michaelfig]

@erights, I pushed some changes to restore some of the logging default behaviour. This was to cause silencing (using the info level as the minimum default) only if $DEBUG was explicitly set to the empty string. Not setting $DEBUG at all, or setting it to anything non-empty, would use the log level as the minimum default.

Let's see this pass CI, then I will review again.

[erights]

Let's see this pass CI, then I will review again.

It passed, thanks much!

[michaelfig]

Please address comments, but otherwise this LGTM!

[michaelfig]

Suggested change

	For the envoronment variables beginning with `LOCKDOWN_` , see [`lockdown` Options](https://github.com/endojs/endo/blob/master/packages/ses/docs/lockdown.md).
	For the environment variables beginning with `LOCKDOWN_` , see [`lockdown` Options](https://github.com/endojs/endo/blob/master/packages/ses/docs/lockdown.md).

[michaelfig]

I overlooked changing this. Please update:

Suggested change

	} else if (DEBUG_LIST.includes('agoric:info')) {
	verbosity = ['-v'];
	} else {
	verbosity = [];
	} else if (DEBUG_LIST.includes('agoric:info') || process.env.DEBUG='') {
	verbosity = [];
	} else {
	verbosity = ['-v'];