Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

This reverts commit a757c4a2.

While it is true that Grack memory use while sending data to a client
was improved, this does not change the fact that the Git processes
running on a GitLab server will use more memory for large repositories.

Update select branch to GitLab look and explain why this guide is long so people are not discouraged.

Fixes https://github.com/gitlabhq/gitlabhq/issues/4319

It looks like the postgresql-9.1 package didn't include the actual client. Needed to install it separately to get this to work.

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Simplified the instructions by two steps.

https://www.ruby-lang.org/en/news/2013/11/22/heap-overflow-in-floating-point-parsing-cve-2013-4164/

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

The company is called Red Hat, and its flagship product is Red Hat Enterprise Linux (commonly abbreviated as RHEL). There is no such thing as RedHat (and never was).

Updated instructions to include proper stable. Otherwise they fail due to Rack extensions required below.

This is needed for Ubuntu 12.04, which only provides Git 1.7.9.

Add the -y option to the python apt-get install commands to be consistent with the rest of the Document.