Issue #2779591 by mark_fullmer, cglauren, joseph.olstad, svenryen, szeidler,...

Issue #2779591 by mark_fullmer, cglauren, joseph.olstad, svenryen, szeidler, maximpodorov, robertgarrigos, tstoeckler, Ace Cooper, efpapado, Manuel Garcia, Kris77, nikolabintev, osopolar, bkosborne, caminadaf, dscl: Fix PHP 7.x warning caused by Version Callback functions that pass parameters by reference not permitted in PHP 7