Case C-341/15: Judgment of the Court (Tenth Chamber) of 20 July 2016 (request for a preliminary ruling from the Verwaltungsgericht Wien — Austria) — Hans Maschek v Magistratsdirektion der Stadt Wien — Personalstelle Wiener Stadtwerke (Reference for a preliminary ruling — Social policy — Directive 2003/88/EC — Article 7 — Right to paid annual — Retirement at the request of the party concerned — Worker failing to use up all his entitlement to annual paid leave before the termination of his work relations — National legislation excluding allowance in lieu of paid annual leave not taken — Sick leave — Public servants)