Issue #3495778 by bramdriesen, smustgrave, cmlara, dawehner, drumm,...

Issue #3495778 by bramdriesen, smustgrave, cmlara, dawehner, drumm, effulgentsia, fabianx, catch, berdir, alexpott, amateescu, BarisW, benjifisher, gábor hojtsy, guypaddock, tim.plunkett, webchick, wim leers, quicksketch, xjm, tedbow, poker10, kim.pepper, jenlampton, larowlan, longwave, plach, mondrake: Update all references to file_save_htaccess()