Breaking: #93182 - Changed file extension for gzip compressed files 

See forge#93182

Description 

When using file compression for resources such as JavaScript or StyleSheets via $GLOBALS[TYPO3_CONF_VARS][FE][compressionLevel] or $GLOBALS[TYPO3_CONF_VARS][BE][compressionLevel] the generated files are now written via the file extension ".gz" instead of ".gzip" in previous versions.

TYPO3 follows the de-facto standard for compressed assets, as ".gz" is much more widespread than ".gzip" file extensions (see https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types/Common_types).

Impact 

Compressed resources are now generated and served via ".gz".

Affected installations 

TYPO3 installations setting the global configuration option.

Migration 

Adapt possible .htaccess or other webserver configuration files by replacing ".gzip" with ".gz" if this feature is activated.