There are miracle-makers and then there is ‘Rehhacles’. The dictionary definition of ‘Rehhacles’ should be: a coach with the powers of a divine hero from Greek mythology who works wonders, thereby producing the kind of ‘Did that really happen?’ moments that make football so compelling. Hertha Berlin clearly believe in ‘Rehhacles’. They need to.   A dozen matches without a win has left the club reaching out for whatever it can to pull itself to safety. But as Hertha kept slipping closer and closer to the drop all they could do was pray for ‘Rehhacles’. On Monday, their call was answered. Still, it was to widespread surprise that Hertha announced the appointment of Otto Rehhagel. Away from the Bundesliga for 12 years, the return…