OPT: allow parser to parse without checking file existence and permissions
OPT: allow parser to parse without checking file existence and permissions

Former-commit-id: 5c1fd9af88db3f9d2fdf9817355c521f7635254d [formerly 040df0b9f6fb3169857773a89a4c00ce49bf34a0]
Former-commit-id: 18868dc3f7e468ce6d5ecd98dd6220f7c11b33f3
Former-commit-id: 80ef00d642d184076d114a24003c0e5947d1d3e8
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox