Merge pull request #11747 from bradly/guides_getting_started_fix

Add note that you must be in the rails app when starting the server
No need to abbreviate application

[ci skip]
Merge pull request #11737 from tkhr/fix-document-about-on-validation-helpers

Fix active_record_validations.md document, `:save` for `on:` validation helper was never available
Conflicts:
	guides/source/active_record_validations.md

[ci skip]
Remove "Using Action View outside of Rails" section from AV overview guide

The section was clearly wrong and was just an example about how to use ActiveSupport helpers in Rack/Sinatra

[ci skip]
Merge pull request #11677 from jaggederest/master

update guide to reflect default HMAC SHA1 in MessageVerifier used in SignedCookieStore

[ci skip]
Merge pull request #11665 from mshytikov/fix-config-log_level

Rails.logger should have level specified by config.log_level.
Conflicts:
	activemodel/test/cases/railtie_test.rb
Merge pull request #11751 from rmm5t/assert_dom_equal-message

Pass assert_dom_equal message arg to underlying assertion
Conflicts:
	actionpack/CHANGELOG.md
Merge pull request #11757 from ryog/fix_document_active_model_errors

Fix: documentation for ActiveModel::Errors [ci skip]
Merge pull request #11760 from rahul100885/master

Added data for permit array into scalar value

[ci skip]
getting started guide: pass the resource to the URL helper [ci skip]

Passing the actual ID is not idiomatic.
migrations guide: fix and edits [ci skip]
Merge pull request #11762 from peterkovacs/patch-2

Free result_metadata directly instead of freeing 2nd, redundant call.
Use the right instrumentation name

The pattern is event.component

Closes #11769
Merge pull request #11763 from schneems/schneems/create-sqlite3db

Create sqlite3 directory if not present
Conflicts:
	activerecord/CHANGELOG.md
config[:database] should be a string

This change was breaking the Railties tests. See
https://travis-ci.org/rails/rails/jobs/9865969
adding a weird test case

Conflicts:
	activerecord/test/cases/base_test.rb
eagerly initialize the attributes module to avoid check-then-set race conditions
initialize ivars so we don't have to constantly check them
push attribute constant cache in to the attribute methods module
initialize generated modules on inclusion and on inheritence