Pause headless rendering

[twisted-nematic57]

I have my render dump frequency set so that it occurs about every 3 hours which seems reasonable to me. But sometimes I just want to halt the Chunky rendering process and dedicate all my computer's horsepower to something else temporarily, and then resume rendering afterwards. Unfortunately this can sometimes mean "wasting" several hours of rendering progress. Moreover, suspending and resuming the java process for Chunky on Windows "breaks" it and doesn't resume rendering after I un-suspend it. It would be very useful to have a way to pause rendering from the command line itself while doing headless, or perhaps a way to immediately save a render dump on-command.

[NotStirred]

I agree a manual dump would be a great improvement
This can be solved temporarily by saving a dump 500 samples (or whatever) and merging at the end