remove rack attack middleware update

Hasn't changed since 7.2 release: https://github.com/gitlabhq/gitlabhq/commits/master/config/initializers/rack_attack.rb.example
Merge pull request #7765 from bbodenmiller/patch-6

remove rack attack middleware update
Add information on information exclusivity.
Add explanation about unintentional sharing.
Merge branch 'security-in-dvcs' into 'master'

Security in dvcs

Explain why access & sharing are the same.

See merge request !1097
CI setup docs

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Mention build script
Merge branch 'ci-setup-doc' into 'master'

CI setup doc

I want do describe what CI services we use

See merge request !1099
check resque.yml.example for config changes
Merge pull request #7767 from bbodenmiller/patch-6

check resque.yml.example for config changes
Delete stray brace

* seems like a small mistake ;-)
Merge pull request #7768 from PragTob/patch-1

Delete stray brace