* Consistent license message for all the go files
* Fixing the last set of unconsistencies with the license headers
* Addressing PR review comments
* Fixing busy.go and busy_test.go license header
* [MM-16719] fixing reflection: now recursing on value, not interface
adding defaults to cfgWithoutEnvOverrides
adding tests
* don't modify the minimalConfig
* MM-11697: Environment overrides do not overwrite config.json on save
#10388
The config store now keeps a copy of the config as loaded from the store
without environment overrides. Whenever persisting, we now check if the
current setting is different from the loaded setting. If it is, then use
the loaded setting instead.
As described in the comments to `removeEnvOverrides` in `common.go`,
this behavior will have to change if we ever let the user change a
setting that has been environmentally overriden.
This was interesting because the `load` function in `common.go` also
persists, so we have to tee the provided `io.ReadCloser` and construct a
config that doesn't have the environment overrides. And then we have to
find the path to the (maybe) changed variable in the config struct
using reflection.
Possible WIP: I had to expose a `GetWithoutEnvOverrides` function in the
Store interface just for the tests -- this is because the `file_test`
and `database_test`s are in the config_test package instead of the
`config` package.
* added function documentation
* fixed a small problem with tests
* MM-11697: big cleanup based on Jesse's PR comments
* MM-11697: edits per PR feedback
* MM-11697: licence header
* MM-11697: now testing that on disk config is not changed by env
overrides
* MM-11697: remove unneeded exports
