Fixed a significant memory leak in reduce due to incorrect rlimit.

[burtonator]

Larger jobs exhibited a crash bug due to artificially constrained rlimit on locked memory.

This should be fixed now and has been merged into default. 

Technically integration tests still need to run as the integration daemon crashed overnight... but I think everything should be fine.

I probably should have held off merging it into default until integration passed though.

I wonder if I can write a pre commit hook to assert that it correctly integrated before we merge.

Kevin