Added paragraph about siteaccess scopes are merged

[vidarl]

Question	Answer
JIRA Ticket	N/A
Versions	3.3, 4.6
Edition	Content/Headless,

Added paragraph about settings for the different siteaccess scopes are merged

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• Added link to this PR in relevant JIRA ticket or code PR

[mnocon]

Thank you Vidar! So for scalar values (string, int) the "higher level" scope simply overwrites the lower levels - but in terms of arrays they get merged together?

[vidarl]

Thank you Vidar! So for scalar values (string, int) the "higher level" scope simply overwrites the lower levels - but in terms of arrays they get merged together?

That is correct

[alongosz]

Thank you Vidar! So for scalar values (string, int) the "higher level" scope simply overwrites the lower levels - but in terms of arrays they get merged together?

That is correct

This is more complicated than that. It depends on specific set of settings and their nesting level. In case of languages this is true, but for each case I'd check the container. We had and probably still have some config merging issues in some places.

[vidarl]

@alongosz already approved this one, so I assume it can be merged?

[mnocon]

Thank you Vidar!

A couple suggestions from me to make it simpler - I'd also mention the ibexa:debug:config command to make sure people know how to check this themselves

[mnocon]

Suggested change

	The language setting for the `de` siteaccess will in this case be `['ger-DE','eng-GB']`, not `['ger-DE']`.
	The final value of the `languages` setting for the `de` SiteAccess is `['ger-DE','eng-GB']`, not `['ger-DE']`.
	You can always check the final values by running the `ibexa:debug:config` console command.
	For this example, the command looks like this:
	``` bash
	php bin/console ibexa:debug:config --siteaccess=de languages
	```

[mnocon]

Suggested change

	Be aware of the fact that configurations in the different scopes are merged, not overwritten. This is important to have
	in mind when dealing with arrays:
	When working with arrays, configurations from different scopes are merged together.
	See the following example:

(modified to take into account Julita's suggestion from below)

[julitafalcondusza]

Just a small remark: "See the following (...)" - new line.