Fixes a few links and typos, and reorganizes the CI "Create a backup"
section.

I don't really like making these an ordered list since they're mutually
exclusive, but I think the structure is what's important.

[ci skip]

[ci skip]

Remove CI help

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/2556

See merge request !1325

Move partial locals out of controller

Some minor cleanup for upload/replace functionality: move controller variables into partial locals.

See merge request !1331

add repository field to issue hook data

Integrate CI navigation more tightly with project

![Screen_Shot_2015-09-17_at_09.51.56](https://gitlab.com/gitlab-org/gitlab-ce/uploads/013807ad9f89a35a4af988199c2ee92f/Screen_Shot_2015-09-17_at_09.51.56.png)
![Screen_Shot_2015-09-17_at_09.52.14](https://gitlab.com/gitlab-org/gitlab-ce/uploads/8f9bdaafeef62fa451ee3699f003cbc4/Screen_Shot_2015-09-17_at_09.52.14.png)
![Screen_Shot_2015-09-17_at_09.52.07](https://gitlab.com/gitlab-org/gitlab-ce/uploads/cb726bf0651ddb74c10fd7bae9a333fb/Screen_Shot_2015-09-17_at_09.52.07.png)

/cc @dzaporozhets

See merge request !1324

The controller_path includes namespaces, where controller_name only includes the class name without controller

Fix schema downgrade introduced by: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/1299

Fixes: https://dev.gitlab.org/ci/projects/1/refs/master/commits/2e9a7032cec02588484eb162717298d311770c7d
Introduced by: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/1299

See merge request !1326

Remove CI cronjob during migration

See merge request !1329

Create a "destroyed Milestone" event and keep Milestone events around in the DB for posterity

Also fix issue where destroying a Milestone would cause odd, transient messages like "created milestone" or "imported milestone".

Now if a milestone is destroyed, at least it will indicate in the activity feed even if it's not clear which milestone was destroyed:

![image](https://gitlab.com/gitlab-org/gitlab-ce/uploads/c89cc8a0a9fa549deac433f17b890913/image.png)

Closes #2382

See merge request !1227

Enable SSL by default

https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/1135

See merge request !1299

Fix 500 on CI project settings

Fix: https://gitlab.com/gitlab-org/gitlab-ce/issues/2546

/cc @dzaporozhets

See merge request !1321

Fix displaying public projects

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/2552

See merge request !1318

Restrict users API endpoints to use integer IDs

Closes #2267

See merge request !1156

Fix HTML link that was improperly escaped in new user e-mail

### Before:

![image](https://gitlab.com/stanhu/gitlab-ce/uploads/e42e73f04971d8dd949b034846d2bb9f/image.png)

### After:

![image](https://gitlab.com/stanhu/gitlab-ce/uploads/90425911345031a4b8e9374323728f79/image.png)

Closes https://github.com/gitlabhq/gitlabhq/issues/9640

See merge request !1323

Closes https://github.com/gitlabhq/gitlabhq/issues/9640

See merge request !1306

add a test for to_hook_data of issue model

update CHANGELOG

Add missing proxy requests to migration docs

See merge request !1317

Change 7-14-stable to 8-0-stable in doc/install/installation.md

Also fixes sudo user from previous MR.

[ci skip]

See merge request !1320

[ci skip]

[ci skip]

Fix 7.14 to 8.0 update guide

[ci skip]

See merge request !1319

Fix confusing behaviour of back link in CI sidebar

Back link should always be responsible for sidebar navigation below.
It should change sidebar navigation to one level up

See merge request !1316