function bnode = maximize_params_softmax(bnode)
% MAXIMIZE_PARAMS_SOFTMAX Find the ML parameter values of a softmax node.
% bnode = maximize_params_softmax(bnode)

options = foptions;
options(1) = bnode.verbose;
options(2) = bnode.wthresh;
options(3) = bnode.llthresh;
options(5) = bnode.approx_hess;
options(14) = bnode.max_iter;
bnode.glim = glmtrain(bnode.glim, options, bnode.parent_vals, bnode.self_vals);
