[xzero] logging: also print stack trace upon logFatal() logging, then abort.
[xzero] logging: also print stack trace upon logFatal() logging, then abort.

christianparpart/x0,xzero/x0,christianparpart/x0,xzero/x0,christianparpart/x0,christianparpart/x0,christianparpart/x0,xzero/x0,xzero/x0,xzero/x0,xzero/x0,christianparpart/x0,christianparpart/x0