Improve TYPO3 Exception 1436717322 or restore original text and improve this?

[sypets]

https://docs.typo3.org/typo3cms/exceptions/main/en-us/Exceptions/1436717322.html

This exception text provides misleading information:

• .env is of no use if dotenv-connector is not used
• environment variables can also be defined elsewhere (e.g. in Webserver configuration)
• BASE_DOMAIN is of no use unless BASE_DOMAIN is the variable which has been defined. Any other variable name can be used, see https://docs.typo3.org/c/typo3/cms-core/11.5/en-us/Changelog/9.5/Feature-86409-AllowUsageOfEnvironmentVariablesInSiteConfiguration.html
• this is a solution for only one possible error.
• deleting typo3temp/Cache is not useful if Composer is used (the suggestion with .env implies that it is)

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Also, I noticed the original text contained more context which had been removed, see: https://github.com/TYPO3-Documentation/TYPO3CMS-Exceptions/blame/d23df932963463949139656542de5f17a212d712/Documentation/Exceptions/1436717322.rst

The context might have been helpful here, it shows that it is a very specific suggestion for one specific usecase.

[brotkrueml]

dotenv-connector is not the only one. One can also use symfony/dotenv or vlucas/phpdotenv. But I agree, this should be made more clear.

Additionally, it is config.yaml, not config.xml.

[DavidBruchmann]

Concerning the deleted comment:
I suppose that backslashes in any URL are certainly a bad idea in general.
Nevertheless it leads to the config.yaml as source of a problem.