Breaking: #62983 - postProcessMirrorUrl signal has moved

Description

While refactoring the Language backend module, the TYPO3CMSLangServiceUpdateTranslationService::postProcessMirrorUrl signal got lost. Due to the refactoring, it has been integrated in another class.

Impact

Using the old signal will prevent the slot from being called.

Affected Installations

All extensions are affected that use the old TYPO3CMSLangServiceUpdateTranslationService::postProcessMirrorUrl signal.

Migration

Change the slot to use the TYPO3CMSLangServiceTranslationService::postProcessMirrorUrl signal. If it is required to serve multiple TYPO3 versions, use the following code:

$signalSlotDispatcher->connect(
	version_compare(TYPO3_version, '7.0', '<')
		? 'TYPO3\\CMS\\Lang\\Service\\UpdateTranslationService'
		: 'TYPO3\\CMS\\Lang\\Service\\TranslationService',
	'postProcessMirrorUrl',
	'Vendor\\Extension\\Slots\\CustomMirror',
	'postProcessMirrorUrl'
);