Suggestion: 2.2 camera changes backport

• Very slightly less claustrophobic camera defaults
• Changed camera settings are saved
• Camera distance increases relatively with splitscreen & analog (splitscreen is x1.5'd so it looks proportional to the change in screen space, analog is x1.2'd so it matches the old hardcoded camera distance of 192 under the new settings)

These changes are kind of debatable because them not saving was an intentional decision before 2.2, and the camera being farther out could potentially clip more geometry where it previously didn't... still, thought I'd open this for consideration; it makes me less nauseous personally, and I'm pretty sick of mashing a bind every time I die. :V

Correct me if I'm wrong, but this should change the default even without adding to the cool config updater, because the cvars didn't have CV_SAVE before.

Hub @ https://github.com/TehRealSalt/SRB2/tree/camera-backport