Breaking: #66906 - Automatic PNG to GIF conversion removed

See forge#66906

Description

The configuration setting $TYPO3_CONF_VARS[GFX][png_to_gif] has been removed.

Impact

If the option is set in an installation, then PNG images used in the TYPO3 Frontend will now be kept as PNG, instead of converting them to GIF files.

Affected Installations

Installations having the option $TYPO3_CONF_VARS[GFX][png_to_gif] activated.