Allows providing accurate availability based on system allocation

One known issue is the loss of column alignment in tab delimited files
if the line starts with a tab character

Reduces the risk of surprises due to IO overload

This way it's possible to specify arguments that are not available
through submitjob options.

The traceback module enables 'set -eu' which makes the shell fail when
bash scripts not written considering strict-mode are loaded.
For instance conda's de/activate scripts fail with 'set -u'.