Extract acme double to helper

Create ACME challanges for pages domains

* Create order & challange through API
* save them to database
* request challenge validation

We're saving order and challenge as one entity,
that wouldn't be correct if we would order certificates for
several domains simultaneously, but we always order certificate
per domain

Add controller for processing acme challenges redirected from pages

Don't save acme challenge url - we don't use it

Validate acme challenge attributes

Encrypt private_key in acme orders

This reverts merge request !28743

Save certificate validity time for pages domains on save
Fill validity time for existing pages domains in background migration

Adds migrations to reset the merge_status of opened,
mergeable MRs. That's required by
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/28513
so we're able to sync the status update along merge-ref,
without leaving MRs with a stale merge-ref.

Now it defaults to 0

Now that the column is ignored, we can safely drop the column

Storing this key in secrets.yml was a bad idea,
it would require users using HA setups to manually
replicate secrets across nodes during update,
it also needed support from omnibus package

* Revert "Generate Let's Encrypt private key"
  This reverts commit 444959bf.

* Add Let's Encrypt private key to settings
  as encrypted attribute

* Generate Let's Encrypt private key
  in database migration

Udpated user_edit_profile_spec with time preferences

Minor update form fields

Issues and merge requests imported from GitHub are having state_id
set to null. This fixes the GitHub project importer and schedule
migrations to fix state_id.

Add env_var and file as supported types for CI variables. Variables of
type file expose to users existing gitlab-runner behaviour - save
variable value into a temp file and set the path to this file in an ENV
var named after the variable key.

Resolves https://gitlab.com/gitlab-org/gitlab-ce/issues/46806.

This database table and AR model is going to be used for
the merge train feature.

This new field will allow to keep track of the storage used by the
packages features, it provides also aggregation at namespace level.

And remove Gitlab::Ci::Trace#deprecated_path as it relies on ci_id
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

We add the option and expose the parameter for frontend work

Store Let's Encrypt account email in application settings
Also add explicit terms of service consent

This enables sending a chat message to Slack or Mattermost
  upon a successful, failed, or canceled deployment

This new table will be used to store the external_dashboard_url which
allows users to add a link to their external dashboards (ex Grafana)
to the Metrics dashboard.

Model.new.attributes now also returns encrypted attributes.

This reverts commit a5378665.

Set pages_domain.remove_at when disabling it
Add specs for marking pages domain for removal
Notify user that domain is being removed
Add documentation

Move Contribution Analytics related spec in spec/features/groups/group_page_with_external_authorization_service_spec to EE

Add columns to store project creation settings

Add project creation level column in groups
 and default project creation column in application settings

Remove obsolete line from schema

Update migration with project_creation_level column existence check

Rename migrations to avoid conflicts

Update migration methods

Update migration method

This reverts merge request !26823

Move Contribution Analytics related spec in spec/features/groups/group_page_with_external_authorization_service_spec to EE

Adds boolean field 'managed' to clusters table. This new column will be
used to distinguish those clusters that are automatically managed by
gitlab.

Needed for https://gitlab.com/gitlab-org/gitlab-ce/issues/56557

Since external diffs are likely to be a bit slower than in-database
ones, add a mode that makes diffs external after they've been obsoleted
by events. This should strike a balance between performance and disk
space.

A background cron drives the majority of migrations, since diffs become
outdated through user actions.

Adds the groundwork needed in order to persist multi-line suggestions,
while providing the parsing strategy which will be reused for the
**Preview** as well.

Adds outdated, lines_above and lines_below columns to
suggestions table.

outdated - boolean which represents whether the suggestion
is outdated or not. For instance, if any line changed after
you left the multi-line suggestion, even though the note
is not outdated, it helps tracking if the content has changed
in the latest file. We cache this information in a column given
it's not a cheap operation to do for every suggestion in the
request time.
lines_below, lines_above - persists the parsed arguments from
`suggestion:-10+3` syntax, where `10` would be lines_above and
3 lines_below. We need that to dynamically calculate which
lines we should monitor for outdating / persisting the correct
content in from_content column.

This will be further required for supporting multi-assignees MRs