Add ability suppress the global "You won't be able [use] SSH" message

This fixes gitlab-org/gitlab-ce#49953, as noted in the documentation
this feature is intended to be used when SSH certificates are
enabled. Then this warning becomes not only pointless, but also
misleading.

This builds on top of gitlab-org/gitlab-ce!21009 since both need to
modify the same documentation, which avoids a merge conflict.

See also the gitlab-org/gitlab-ce#49218 issue and associated merge
request.

2 files changed, 21 insertions, 1 deletions

diff --git a/db/migrate/20180808162000_add_user_show_add_ssh_key_message_to_application_settings.rb b/db/migrate/20180808162000_add_user_show_add_ssh_key_message_to_application_settings.rb
new file mode 100644
index 00000000000..e3019af2cc9
--- /dev/null
+++ b/db/migrate/20180808162000_add_user_show_add_ssh_key_message_to_application_settings.rb
@@ -0,0 +1,19 @@
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class AddUserShowAddSshKeyMessageToApplicationSettings < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_column_with_default :application_settings, :user_show_add_ssh_key_message, :boolean, default: true, allow_null: false
+  end
+
+  def down
+    remove_column :application_settings, :user_show_add_ssh_key_message
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index f1d8f4df3b7..1288a98745c 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20180807153545) do
+ActiveRecord::Schema.define(version: 20180808162000) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -170,6 +170,7 @@ ActiveRecord::Schema.define(version: 20180807153545) do
     t.boolean "hide_third_party_offers", default: false, null: false
     t.boolean "instance_statistics_visibility_private", default: false, null: false
     t.boolean "web_ide_clientside_preview_enabled", default: false, null: false
+    t.boolean "user_show_add_ssh_key_message", default: true, null: false
   end
 
   create_table "audit_events", force: :cascade do |t|