copperwater 9b0d78d265 Port the autounlock feature from UnNetHack ...

This adds a boolean option, autounlock, defaulting to true. When this is
set to TRUE, messages stating that some door or container is locked are
automatically followed by a prompt asking if you would like to unlock
it, if you are carrying an unlocking tool (key, lock pick, or credit
card).

Architecturally, this extends the pick_lock function to take three
additional arguments (door coordinates or a box on the ground you are
autounlocking).

Because this adds a new field to struct flag, this is not a
save-compatible change. I have not adjusted EDITLEVEL or
VERSION_COMPATIBILITY, though.

The code that selects an unlocking tool will always look first for a
skeleton key, then a lock pick, then a credit card. Since curses, rust,
and other attributes don't really have an effect on the viability of the
unlocking device, it didn't seem to warrant making a more complex
function for that.

2019-09-30 21:32:11 -04:00

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