Crafting menu can be accessed even in the dark.

But the actual crafting can't be done if it's too dark to see.
Hibernation-info

Adds a specific safety-check on entering the Hibernation part of the
food meter and provided a quick hint as to the general idea.  Thanks for
the merge-cleanup and the guidance, Kevin.  Much appreciated.

Attempted to add memorial notes for engorgement, actually entering
hibernation, and successful exit; killed a successful hibernator and
just got the msglog and an empty killcount, though.  Not sure what I
missed.
Refactor mutagen iv iuse to repeat itself less.
Add a one-time message asking player of they want to start gorging when they have the hibernation trait.
Changes as requested

Looks like these work.
Add craftable glass shiv.
Add postman gear item group
Add postman gear item group to zombies drops
Gear

Gas mask, rebreather, tentacle-socks, and jumpsuit.  Debating whether
Labs would slap a wetsuit on Fish/Cephalopod mutant-subjects...thinking
not.
Recipes, recipe locations, and spawns

This ought to cover it.
Hooves too
rebreather fix

Thanks for the reminder, Rivet.
json fix

fatfingered Cut rather than Copy, looks like.
More json syntax
Merge pull request #5009 from KA101/MutantGear

[MWR] Mutant gear
Merge pull request #5004 from ianestrachan/glass-shiv

Add craftable glass shiv.
Adding a pickup rule with the (Advanced) inventory item menu will ask to enable the auto pickup option if it is disabled. This adresses the possible issue with https://github.com/CleverRaven/Cataclysm-DDA/issues/4993.
"Auto pickup enabled" option can now be changed through the auto pickup manager.
Minor cosmetic changes.
Food decay scales to ambient temperature in a realistic(*) fashion
* This is assuming the values for spoils arre realistic
* Everything decays at the same rate as before in 65 degree weather,
  decay rate doubles or halves every 18 degrees F, to virtually nil
  at freezing, to 6 times the rate at 105 F. Don't leave meat out in
  a hot summer day.
* Car fridges result in a static 20% normal at 65 degree rate, as before.
* Instead of fiddling with item bday, this uses 'rot' and 'last_rot_check'
  variables to maintain a steadily increasing amount of spoilage.
* If/when environmental zones are added, this will be able to vary
  based on submap temperature and shade
your base are belong to nowhere
Improved list_monsters() with healthbar, attitude and aggro indicator.