task 2.3.0

Closes #26046.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
Revert "zsh: disable /etc files by default"

This reverts commit 52fe004dd257ccf105dc6a5fe4b9cd570285e6b7.

Conflicts:
	Library/Formula/zsh.rb

References #24538.
References #25719.
zsh: remove caveats for system file modifications.