Move benchmarking options from mdrun to a dedicated tool - Redmine #3255
Deprecated in GROMACS 2019, options such as -confout, -resethway, -resetstep are not intended for use by regular mdrun users, so making them only available with a dedicated tool is more clear. Also, this permits us to customize defaults for e.g. writing files at the end of a simulation part in ways that suit the respective mdrun and benchmark use cases, so -confout will no longer be required.
(from redmine: issue id 3255, created on 2019-12-19 by eirrgang)