Case C-270/16: Judgment of the Court (Third Chamber) of 18 January 2018 (request for a preliminary ruling from the Juzgado de lo Social No 1 de Cuenca — Spain) — Carlos Enrique Ruiz Conejero v Ferroser Servicios Auxiliares SA, Ministerio Fiscal (Reference for a preliminary ruling — Social policy — Directive 2000/78/EC — Equal treatment in employment and occupation — Article 2(2)(b)(i) — Prohibition of discrimination based on disability — National legislation permitting, subject to certain conditions, the dismissal of an employee by reason of intermittent absences, even where justified — Worker’s absences resulting from illnesses linked to his disability — Difference in treatment based on disability — Indirect discrimination — Whether justified — Combating absenteeism in the workplace — Whether appropriate — Whether proportionate)