* upstream/master: (116 commits)
Revert "Merge branch 'grpc-1.3.4' into 'master'"
Return nil when looking up config for unknown LDAP provider
Avoid crash when trying to parse string with invalid UTF-8 sequence
Enable Gitaly by default in GitLab 9.3
Don’t create comment on JIRA if link already exists
Disable sub_group_issuables_spec.rb for mysql
Fix math rendering on blob pages
Add changelog
Don't allow to pass a user to ProjectWiki#http_url_to_repo
Revert "Merge branch '1937-https-clone-url-username' into 'master'
"
Fix bottom padding for build page
Fix /unsubscribe slash command creating extra todos
Fix omniauth-google-oauth2 dependencies in Gemfile.lock
Update looks job log
'New issue'/'New merge request' dropdowns should show only projects with issues/merge requests feature enabled
Fix spec for Members::AuthorizedDestroyService
31616-add-uptime-of-gitlab-instance-in-admin-area
Set head pipeline when creating merge requests
Create a separate helper to check if we show particular tab on a search page
Add performance deltas between app deployments on Merge Request widget
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