Update activerecord/CHANGELOG.md

Ensure Date header on expires_in

Correctly print names of non-timestamped migrations with db:migrate:status

[ci skip]

RFC 3986[1] allows sub-delim characters in path segments unencoded,
however Rack::File requires them to be encoded so we use URI's
unescape method to leave them alone and then escape them again.

Also since the path gets passed to Dir[] we need to escape any glob
characters in the path.

[1]: http://www.ietf.org/rfc/rfc3986.txt

escape static file path to prevent double unescaping

Connection pools are 1:1 with pids.

This patch adds ability to set custom console if you want to use
something other than IRB. Previously the hack that people used
was:

    silence_warnings do
      require 'pry'
      IRB = Pry
    end

which is not the best way to customize things.

move id_before_type_cast to PrimaryKey module

Autoload various constants effectively in abstract connection adapter.

ActionDispatch: add missing test for callbacks

Revert "No need to pass options which is never used"

Options is needed for some Rails extensions to determine when
referential integrity should be disabled

This reverts commit bcb466c5.

Fixes #5052