autopilot.js: Limit hash spending on min security / max money

[alainbryden]

Part 1:
Borderline Bug: We keep spending on min security despite diminishing returns (and increasing costs).

Spending on max money seems to scale more usefully, because the returns don't diminish, especially if we are constantly spending on the same highest-income earning server.

Part 2:
Something that needs investigation though, is that the game claims that there is a soft cap on server max money:

In late BN12.x's server max money is severely penalized, so we're unlikely to bump up against this cap:

But there should be something in the code that checks for the cap and avoids spending (wasting) additional hashes on the same server once its cap is hit.

Part 3:
This spending wouldn't be so bad if there was nothing better to spend the hashes on, but autopilot sets this up to happen "--liquidate" mode, which competes with spending on Bladeburner rank / sp (when it's active), and which is arguably more valuable in late BN12.x's (scales better in any event). As such, we should put a spending limit or find some way to better balance saving up for bladeburner upgrades (whose cost scales more rapidly) vs dumping most of our money into hack upgrades.