Remove internal options from query string of paths

It is not being used in our tests

Also add to upgrading guide a notice about the deprecated sanitizers

Amend welcome page

Serialize Global IDs as special objects, distinguishable from Strings

This reverts commit 585e7569.

Fixes #17057

Fix typo

Remove --skip-action-view option from application generator

activerecord/connection_pool: honor overidden rack.test in tests

[CI SKIP] Improve force push note.

Fix loading fixtures in engine tests

Added note about updating pull requests by force push

fixture_path is a class attribute of ActiveSupport::TestCase, so
ActiveSupport::TestCase.method_defined?(:fixture_path=) would always
return false.

This should fix #4971

- Added note about force pushing same branch to update a existing pull
  request instead of opening new one in contributing guide.
- [ci skip]

add message to `assert` in `assert_enqueued_with`

Added test for exception message for validate method

- Test case for https://github.com/rails/rails/pull/16851

Honoring an overidden `rack.test` allows testing closed connection between
multiple requests. This is useful if you're working on database resiliency, to
ensure the connection is in the expected state from one request to another on
the same worker.

Update changelog with tenderlove's entry

[ci skip]

it doesn't work on SQLite3 since it doesn't support truncate, but that's
OK.  If you call truncate on the connection, you're now bound to that
database (same as if you use hstore or any other db specific feature).

Clarify the documentation of the primary_key option for associations

Previously the documentation stated that `primary_key` should be the name of
a *method* that returns the primary key used for the association. This is
incorrect. This changes the documentation to say that the value must be the
name of a column.

Cleaner queuing of jobs using Delayed Job

Conflicts:
	activejob/lib/active_job/queue_adapters/delayed_job_adapter.rb

Fixtures using Foreign key symbols

fix fixtures not loading if a belongs_to association is defined with a :foreign_key option that's a symbol