Limiting the size of issuable description and comments to 1_000_000,
which is close to ~1MB of ASCII characters, which represents 99.9% of
all descriptions and comments we have in DB at the moment. This should
help prevent DoS attacks when comments contain refference strings.

Also this change updates regexp matching the namespaces paths by
limiting the namespaces paths to Namespace::NUMBER_OF_ANCESTORS_ALLOWED,
as we allow 20 levels deep groups.

see https://gitlab.com/gitlab-org/gitlab-ce/issues/61974#note_191274234

Marcel Amirault authored 5 years ago and Achilleas Pipinellis committed 5 years ago

Previously, we used brackets to denote the tier badges,
but this made Kramdown, the docs site Markdown renderer,
show many warnings when building the site. This is now
fixed by using parentheses instead of square brackets.

This was caused by [PREMIUM] looking like a link to
Kramdown, which couldn't find a URL there.

See:
- https://gitlab.com/gitlab-com/gitlab-docs/merge_requests/484
- https://gitlab.com/gitlab-org/gitlab-ce/issues/63800

Achilleas Pipinellis authored 5 years ago and Evan Read committed 5 years ago

The following EE files had small differences with their CE counterpart
so they have been ported to CE:

- doc/api/boards.md
- doc/api/discussions.md
- doc/api/notes.md
- doc/api/resource_label_events.md
- doc/api/services.md

Replace all '9koXpg98eAheJpvBs5tK' occurrences with
'<your_access_token>' in API docs.

- Allow `created_at` and `updated_at` parameters on Issues API
- Allow `created_at` on Issue Notes API

Closes gitlab-org/gitlab-ce#40059

* adds basic discussions API for issues and snippets
* reorganizes notes specs (so same tests can be used for all noteable types - issues, MRs, snippets)

In API V4 all endpoints were changed so Merge Requests and Issues
should be referred by iid, instead of id. Except the /notes endpoint
was forgotten. So change the endpoints from:

- /projects/:id/issues/:issue_id/notes
- /projects/:id/merge_requests/:merge_request_id/notes

To:

- /projects/:id/issues/:issue_iid/notes
- /projects/:id/merge_requests/:merge_request_iid/notes

For Project Snippets nothing changes.

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

This reverts commit 3e991230.

# Conflicts:
#	app/models/project.rb

This reverts merge request !4030

See https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/3103

This partially reverts commit 836d5930.