Comment 1 for bug 1096867

We have discovered that it is most efficient if we group many (100-300) point sources into a single task. For simple and complex fault sources, it is still advised that only 1 source is given per task.

I think we should add a separate configuration option to define `block_size` for point sources, like so:

[hazard]
`point_source_block_size`: New. Suggested value is 200-300.
`block_size`: Already exists. No change. Suggested value is 1.