Mark this as version 6.17.
Make autoreload configurable, and default it to off.
Disable SL2.
Docs.
Make imagemap_button inherit from hotspot, remove modern uses of imagemap_button.
Leave disabled file pacges.

This kicks in if we're on the auto or quick pages, and a creator
sets has_autosave or has_quicksave to false.
Add renpy.clear_keymap_cache.
Revert changes caused by 6.17 merge.