Automatically populating $HTTP_RAW_POST_DATA is deprecated #1

On several occasions the following error message appears:

Automatically populating $HTTP_RAW_POST_DATA is deprecated and will be removed in a future version. To avoid this warning set 'always_populate_raw_post_data' to '-1' in php.ini and use the php://input stream instead. at Unknown#0

This should be fixed before the next nextcloud release