[stable10] Merge pull request #31047 from owncloud/config_sample_php_integrity_app
[stable10] Merge pull request #31047 from owncloud/config_sample_php_integrity_app

doc improvement for integrity.ignore.missing.app.signature

owncloud/core,phil-davis/core,owncloud/core,owncloud/core,owncloud/core,owncloud/core