Add php value for setting auto_detect_line_endings on.

[philcook]

This PR is to fix issue #6393

The default for auto_detect_line_endings when PHP is installed is off therefore to stop other users of magento falling into this issue the htaccess file can cover this off.

Thanks for considering.

[magento-cicd2]

All committers have signed the CLA.

[okorshenko]

Hi @philcook
Thank you for your contribution. Unfortunately, we can not accept this pull requests. PHP itself does not recommend enable this option

This enables PHP to interoperate with Macintosh systems, but defaults to Off, as there is a very small performance penalty when detecting the EOL conventions for the first line, and also because people using carriage-returns as item separators under Unix systems would experience non-backwards-compatible behaviour.

We don't want to change this behaviour on Magento framework level.
Thank you