UseCommandLine option.

[FakelsHub]

sfall-team@6f08a50#commitcomment-60946860

Noticed a possible issue: if the overriding ini file has a mismatched graphics mode setting (DX9 vs. non-DX9), it will cause either crashes or glitched game screen.
For example (the game has the external HRP enabled):

ddraw.ini has Mode=0 and myconf.ini has Mode=5 -> crash when using fallout2 myconf.ini.
ddraw.ini has Mode=5 and myconf.ini has Mode=0 -> the game will be in fullscreen with glitched colors.
ddraw.ini has Mode=6 and myconf.ini has Mode=5 (both are in DX9 modes) -> the game will be in DX9 windowed mode (normal).

Disabling the external HRP will result in only crashes for the first two cases. Not sure why this happens, supposedly it should override ddraw.ini already before initializing the graphics module, i.e. modules will load option values from the new ini.