Merge pull request #17802 from aar0nTw/remove-dependent-with-through-note

[ci skip] Remove outdate note of :dependent in guide
Merge pull request #17803 from sadfuzzy/patch-2

Update cookies.rb
Conflicts:
	actionpack/lib/action_dispatch/middleware/cookies.rb
Revert "Test against rack master"

This reverts commit 2a4e14db981e38611667d407a975600ee720ada7.
Bump to rack 1.6.0.beta2