Fixes a typo and a capitalization.
mod to mainline
item groups
empty line
Revert "refactored season length calculation for consistency"

This reverts commit 6bdfe81ebc665c85ccf985dc9b4e76ee5a687211.

Conflicts:
	src/calendar.cpp

Test-revert, see if it lets weather work yet doesn't break saving
RC control to item groups
It's not a good court

Because it's stale, rotting, and overpriced mall food!
Merge remote-tracking branches 'dda/pr/8569', 'dda/pr/8570', 'dda/pr/8571' and 'dda/pr/8572' into dda-master

* dda/pr/8569:
  Fixes a typo and a capitalization.

* dda/pr/8570:
  RC control to item groups
  empty line
  item groups
  mod to mainline

* dda/pr/8571:
  Revert "refactored season length calculation for consistency"

* dda/pr/8572:
  It's not a good court
Some new flyers!

Clueless CDC public safety message, ominous FEMA message, rambling
conspiracy-nut-who-was-actually-right-for-once pamphlet, crazy religious
person chastising everyone for being sodomites message, crazy cultist
who wants to be eaten by Cthulhu message, scary
the-Army-is-not-your-friend message.
Cultist flyer->cultist note.
Fix NPC pickup crash

Thanks to hmmR89 for the spot and fix-suggestion.
Merge pull request #8579 from Rivet-the-Zombie/new-flyers

New flyers and note.
Merge pull request #8578 from KA101/crashtest

Fix NPC pickup crash
Fix crash on sleep

The "lying down" disease would add the "sleep" disease which would invalidate the (implicit) iterator use by the range-based iteration.
Handle calendar::season_length without active world.