Pressing 'y' to confirm a dangerous action should require a capital Y

[nstoddard]

Sometimes it happens that I'm moving up and to the left with the 'y' key, but I'll accidentally try to step into a chasm or onto dangerous terrain. If that happens, the prompt to confirm the action is normally enough to avoid falling, but it's easy to accidentally press 'y' once more (which confirms the action), since it's also a movement key. To avoid this sort of issue, can this prompt be changed to require a capital 'Y'?

[nstoddard]

@tmewett Two people have given this issue a thumbs up, but I noticed you haven't given this issue a label yet. Is this something you'd accept a pull request for if I made one?

[tmewett]

I think this should be configurable... Maybe it's finally time for a settings system...