Allow the usage of t3lib_befunc::getProcessedValue() in the frontend
The separation between BE and FE is sometime a big issue in some projet. I supply a little patch to allow the use of t3lib_befunc::getProcessedValue() in a frontend extension. The idea is not to port all the BE API to the FE, but a coding a copy of getProcessedValue in FE it's not a good option.
The proposed patch simply add a proxy method t3lib_befunc::sL to switch between $LANG->sL and $TSFE->sL depending on TYPO3_MODE
(issue imported from #M17601)