* Turkey has been key supporter of current Somali govt
* Aid credited with helping millions during 2011 famine
* War-ravaged Somalia plagued by fighting since 1991
By Drazen Jorgic and Tulay Karadeniz
NAIROBI/ANKARA, Feb 13 (Reuters) - Turkey has stopped direct budgetary support to Somalia, cutting off a major source of funding for a government trying to rebuild the country after more ...