Docs: update GFM guide

See merge request gitlab-org/gitlab-ce!22719

Remove EE-specific code from 'Discussion' models

Closes #6679

See merge request gitlab-org/gitlab-ee!8145

CE upstream - 2018-10-31 11:21 UTC

Closes gitlab-ce#53259 and gitlab-org/release/framework#26

See merge request gitlab-org/gitlab-ee!8159

Remove gitlab-ui's modal from global (EE)

See merge request gitlab-org/gitlab-ee!8156

EE port of Adds required prop to the post merge pipeline

See merge request gitlab-org/gitlab-ee!8162

EE port of Adds required prop to the post merge pipeline

See merge request gitlab-org/gitlab-ee!8162

Add gitlab:packages:migrate task to migrate package files to object storage

See merge request gitlab-org/gitlab-ee!7810

Allow filtering by weight in issues API

Closes #7927

See merge request gitlab-org/gitlab-ee!8140

Fix conflicts for  app/assets/javascripts/vue_merge_request_widget/components/mr_widget_pipeline.vue

# Conflicts:
#	app/assets/javascripts/vue_merge_request_widget/components/mr_widget_pipeline.vue
#	app/models/blob.rb
#	locale/gitlab.pot
#	spec/javascripts/vue_mr_widget/mock_data.js

[ci skip]

Document implicit feature flag checks

Closes gitlab-org/release/framework#26

See merge request gitlab-org/gitlab-ce!22669

Merge branch '41545-gitlab-merge-request-status-could-not-connect-to-the-ci-server-please-check-your-settings-and-try-again' into 'master'

Resolve "Reword error message for internal CI unknown pipeline status"

Closes #53056

See merge request gitlab-org/gitlab-ce!22474

Merge branch 'ee-41545-gitlab-merge-request-status-could-not-connect-to-the-ci-server-please-check-your-settings-and-try-again' into 'master'

EE Resolve "Reword error message for internal CI unknown pipeline status"

See merge request gitlab-org/gitlab-ee!8073

CE upstream - 2018-10-30 14:22 UTC

Closes gitlab-ce#51128, gitlab-ce#51142, gitlab-ce#53072, gitlab-ce#53153, gitlab-ce#53317, gitlab-org/quality/staging#14, and #6067

See merge request gitlab-org/gitlab-ee!8151

Cherry-picked from master to resolve automated CE-to-EE MR spec
failures.

Renaming Secret Variables in the codebase (EE Port)

See merge request gitlab-org/gitlab-ee!7964

Add instructions to find the usage ping payload

See merge request gitlab-org/gitlab-ce!22571

Absorb product into factory

Closes gitlab-ce#52992

See merge request gitlab-org/gitlab-ee!8100

CE: Absorb product into factory

See merge request gitlab-org/gitlab-ce!22698

Refactor the backup/restore docs

See merge request gitlab-org/gitlab-ce!22576

Added info on getting k8s integration for existing cluster

See merge request gitlab-org/gitlab-ce!21783

Fix broken ie11 due to non-transpiled components in gitlab-ui

Closes #53052

See merge request gitlab-org/gitlab-ce!22695

Add language param to highlight

See merge request gitlab-org/gitlab-ce!21584

(EE-Port) Add language param to highlight

See merge request gitlab-org/gitlab-ee!7276

Move Repository#wrapped_gitaly_errors into concern

See merge request gitlab-org/gitlab-ce!22691

Removed unused css class

Fix structure and add  notification level

See merge request gitlab-org/gitlab-ce!22528