• Added option grad_f_constant to specify that objective function is linear. If set, the gradient of the objective will be requested by Ipopt only once. [#597]
• Added OrigIpoptNLP::orig_d_L() and OrigIpoptNLP::orig_d_U() to get original constraint sides (before relaxation due to bound_relax_factor > 0).
• TNLP::get_curr_violations() now returns the constraint violation and complementarity with respect to the original (non-relaxed) constraint sides. [#603]