Provide a method to set defaults common to all profile settings

[gdevenyi]

New feature

I would like to be able to set settings common across profiles

Currently, the documentation contains this warning:

This warning is against exactly the kind of configuration I would like to achieve.

Two possible solutions:

1. Allow this kind of implicit defaults with clear semantics about order ex: "last parameter specified in config is used"
2. Introduce a new reserved profile name _nf_defaults or somesuch, where its settings are merged with other profile settings.

This is similar in scope to the "comma separated" profile list with an implicit profile always loaded first.

[bentsherman]

The example in that warning is actually exactly how it's supposed to work, but there are cases where the config isn't resolved correctly. In fact that specific example might even work if you try it.

It is a quirk of the current config parser rather than a design choice. It will be fixed by the upcoming strict config parser #4744 .