BAGHDAD, Oct 25 (Reuters) - Iraqi security forces have retaken most of the town of Jurf al-Sakhar near Baghdad from Islamic State militants, the biggest gains in months of fighting for the strategic area, senior local officials said on Saturday. Full control of the town could allow Iraqi authorities to prevent the Sunni insurgents from edging closer to the capital and maintaining connections to their strongholds in western Anbar province as well as infiltrating the mainly Shi'ite south. ...