star: fix for conv_vel
star: again with limits to conv_vel
star: fix for limits on conv_vel changes per iteration
star: be careful with calculation of L_rad in equL when conv_vel is on
star: ignore burn_steps_limit when T is below limit for op_split_burn
star: 30M_big_net passes with max_tries=30 (one iter needs 26 steps)
star: set logT_for_conv_vel off by default
star: conv_vel changes for test