INI option override system

[phobos2077]

When mod needs to override some sfall settings, it has to be distributed with an installer that does this, or instruct users to do it manually (and users may screw things up badly). The only fail safe system is to check and override ddraw.ini settings from an SSL script when starting or loading a game, which isn't perfect (requires user to quit and restart the game).

Suggested solution:
Option A:

• Modify all INI-related operations. When read from INI is requested, first check if it's exist in Fallout VFS. If it is, load it in memory (or some temporary folder), and then read setting from that INI. Cache the loaded ini file. If setting doesn't exist, then try again in the normal file system (based on game root folder).

Option B:

• An extension of option A, but instead of just loading INI from VFS, manually follow the same load order of PATCH archives/folders as VFS, and repeat the same steps.

[phobos2077]

One issue I see with setting override like this is that if user open ddraw.ini, he sees some settings, and expects them to apply, but they don't. It may get confusing. Maybe instead we could also update actual ddraw.ini based on mod setting overrides, respecting mod load order?