Breaking: #68178 - Drop $GLOBALS['TYPO3_CONF_VARS']['SYS']['form_enctype']

See forge#68178

Description

Setting $GLOBALS['TYPO3_CONF_VARS']['SYS']['form_enctype'] has been dropped without replacement.

Impact

Extensions that used this setting in forms may end up with an empty enctype attribute in HTML form fields.

Affected Installations

Extensions that rely on this variable being set.

Migration

Substitute the variable access with multipart/form-data.