introduced command-specific "run_vars" defaults to complement and override the program-global "run_vars" defaults
introduced command-specific "run_vars" defaults to complement and override the program-global "run_vars" defaults

If defined, command-specific "run_vars" INDIVIDUALLY override program-global "run_vars" defaults for each environment variable.
Naturally, the highest precedence values come via --env.VAR_NAME=var_value route.

ctuning/ck-autotuning,ctuning/ck-autotuning,ctuning/ck-autotuning,ctuning/ck-autotuning,ctuning/ck-autotuning,ctuning/ck-autotuning