Add detail to backup_restore omnibus remote storage docs
See the general Documentation guidelines http://docs.gitlab.com/ce/development/doc_styleguide.html
What does this MR do?
Adds some important details to configuring remote storage with the backup_restore
rake task, namely to add the configuration to /etc/gitlab/gitlab.rb
and to make sure to run gitlab-ctl reconfigure
after changing that file.
I burned a little bit of time with this, and at least one other person has run into this: #12929 (moved)
Moving docs to a new location?
Nope!