- Added clarity to documentation of ArrayInquirer#any? [ci skip]

- Added clarity to documentation of ArrayInquirer#any? [ci skip]

Dont cache the conn_spec_name when empty

`remove_connection` can reset the `connection_specification_name`, so we
need to to set it after the remove_connection call on
`establish_connection` method.

We cannot cache the connection_specification_name when it doesnt
exist. Thats because the parent value could change, and we should keep
failling back to the parent. If we cache that in a children as an ivar,
we would not fallback anymore in the next call, so the children would
not get the new parent spec_name.

[ci skip] Update documents of `ConnectionHandler`

Getting Started Guide: Update Ruby version to 2.3.1p112 [ci skip]

[ci skip]

Follow up of #24844.
The key of `@owner_to_pool` was changed from `klass.name` to
`spec.name`. By this change "memory leaks in development mode"
will not happen, bacause the equality of string is not changed
by reloading of model files.

remove_connection

When calling `remove_connection` on a model, we delete the pool so we also
need to reset the `connection_specification_name` so it will fallback to
the parent.
This was the current behavior before rails 5, which will fallback to the
parent connection pool.

[fixes #24959]

Special thanks to @jrafanie for working with me on this fix.

Minor syntax change

While working on this very example recently, I found that Rails will throw POST errors if you leave an empty block in front the `format.js` when using either `remote: true` or vanilla  JS/JQuery.

Should quote `lock_name` to pass to `get_advisory_lock`

Replacement cycle for readability

Fix Gemfile.lock by updating rails-dom-testing

- Followup of https://github.com/rails/rails/pull/24946.

Update rails-dom-testing gem to 2.0

Resolves #24924.

use Rack::Utils.valid_path? to check path

Improve AV changelog with regards to default RAW handler

Feature getting started guide [ci skip]

It highlights which kind of incompatibilities this could lead to when rendering plain JS or HTML partials.

Add :ssl/:tls to ActionMailer rdoc [ci skip]

WIP: Action Cable JavaScript tests

Will be using this in later code.

Each test executes in another tmp folder, so there's no chance
of polluting another test run.

This commit uses the new method in Rack to check if a path is valid.

Replacement cycle for readability

Change http github links to https [ci skip]

Use consistent term `underscored`