[gentoo-portage-dev] suggestion for qa-check verbosity

[M.B.]

Good evening,

please consider merging this patchset. It includes:
- brief documentation of the install-qa-check.d mechanism in portage.5
- implementation of the noisy-qa option for FEATURES
- implementation of the __noisy_qa() function
- use of the __noisy_qa() function to make existing default qa-checks
more verbose (for developer diagnostics)

In particular, the noisy-qa FEATURE is intended to alert developers of
unfulfilled preconditions to run specific checks (in particular
10ignored-flags proved repeatedly troublesome) and to show which checks
(from the overriding hierarchy) are actually run.

The attached patch can go directly into
/etc/portage/patches/sys-apps/portage/ and works with portage 2.3.0_rc1.

Alternatively the repo is located at
https://gitlab.com/tomboy64/portage/compare/master...increase-qacheck-verbosity
If required I can provide the commits one patch per commit.

Thank you for your time.

With kind regards,
tomboy64