Case T-87/05: Judgment of the Court of First Instance of 21 September 2005 — EDP v Commission (Competition — Concentration — Regulation (EEC) No 4064/89 — Decision declaring a concentration incompatible with the common market — Portuguese electricity and gas markets — Acquisition of GDP by EDP and Eni — Directive 2003/55/EC — Liberalisation of gas markets — Commitments)