`umask 000` leads to `mxqsub.c:510: add_job: Assertion 'j->job_umask' failed.`

[pmenzel]

A user set their umask to 000, triggering the assert below:

mxq/mxqsub.c

Line 510 in f3d9fb8

assert(j->job_umask);

Perhaps a user understandable log messages should be shown.

[donald]

I'd say that assert should just be removed, because 000 is a valid umask.