By Jill Gralow GHINNI GHINNI, Australia (Reuters) -Farmer Mark Kappa was enjoying his first hot drink in three days as he waited patiently for his meal in front of a food truck run by a Sikh charity, after incessant rain in Australia’s southeast cut off towns and forced thousands to evacuate their homes. Melbourne-based Sikh Volunteers Australia travelled nearly 1,200 km (746 miles) to the rural