Raise an exception when unserialization fails due to a missing class
Allow transparent upgrading of legacy signed cookies to encrypted cookies; Automatically configure cookie-based sessions to use the best cookie jar given the app's config
reverts changes to Rails.version made in #8501
Break down  Rails::Generator::TestCase into modules
gist for Active Record issues [Neeraj Singh & Xavier Noria]

This commit closes issue #9775.
fix detect column type of enum

enum includes text or blob or ... hooked by wrong regex
Turning on warnings in "rake test" for railties
typo recomend -> recommend
Merge pull request #10026 from ogawaso/typo

typo recomend -> recommend
Merge pull request #9978 from trevorturk/cookie-store-auto-upgrade

Cookie-base session store auto-upgrade
Merge pull request #10025 from masarakki/fix_detect_enum_column_on_mysql

fix detect column type of enum
Merge pull request #10021 from pabloh/refactor_rails_generator_test_case

Refactor Rails::Generator::TestCase into modules
Move the class methods to above the protected section
Improve documentation around the cookie store auto-upgrade to encryption
Make references with index:true pass Hash options to add_index.
Merge pull request #10010 from pwnall/fix_ref_index_true

Make references with index:true pass Hash options to add_index
Merge pull request #10031 from trevorturk/cookie-store-auto-upgrade-docs

Improve documentation around the cookie store auto-upgrade to encryption
:uniq is still a valid relation option since it was only silently
deprecated

Fixes activerecord-deprecated_finders build.

https://travis-ci.org/rails/activerecord-deprecated_finders/builds/5964703
Fixed typo on AP dispatch Mime::Type test
Merge pull request #10002 from charliesome/revert-version-method-on-rails

Reverts changes to Rails.version made in #8501