No need to edit database.yml for standard Postgres

Postgres running on localhost should recognize the `git` system user
used by GitLab so there is no need to set/change database passwords.
Be more specific about when to edit database.yml
Add patch release document.
EE changelog note.
Link to the doc.
Speed up loading and add pagination to wiki pages page.
Satellite will exist when doing automerge_check.
List the next steps.
Update security document with the link to patch document.
Merge branch 'add_patch_release_doc' into 'master'

Add patch release documentation for developers
Merge branch 'postgres_installation' into 'master'

No need to edit database.yml for standard Postgres
100k organizations use GitLab.
Merge branch '100k' into 'master'

100k
Merge branch 'link-to-oauth-doc' into 'master'

Link to oauth doc

Possible after https://github.com/gitlabhq/gitlabhq/pull/6741/files
Merge branch 'simple-pointers-in-readme' into 'master'

Simple pointers in readme
Merge branch 'speed_up_wiki_pages' into 'master'

Speed up wiki pages page
Merge branch 'satellite_exists_in_automerge_check' into 'master'

Satellite exists in automerge check
Merge branch 'master' of github.com:gitlabhq/gitlabhq