Merge branch 'update-git-to-2-18-0' into 'master'

Update Git version to 2.18.0

See merge request gitlab-org/gitlab-ce!20489

.gitlab-ci.yml

-image: "dev.gitlab.org:5005/gitlab/gitlab-build-images:ruby-2.4.4-golang-1.9-git-2.17-chrome-67.0-node-8.x-yarn-1.2-postgresql-9.6-graphicsmagick-1.3.29"
+image: "dev.gitlab.org:5005/gitlab/gitlab-build-images:ruby-2.4.4-golang-1.9-git-2.18-chrome-67.0-node-8.x-yarn-1.2-postgresql-9.6-graphicsmagick-1.3.29"
 
 .dedicated-runner: &dedicated-runner
   retry: 1

doc/install/installation.md

@@ -92,9 +92,9 @@ Is the system packaged Git too old? Remove it and compile from source.
 
     # Download and compile from source
     cd /tmp
-    curl --remote-name --progress https://www.kernel.org/pub/software/scm/git/git-2.16.3.tar.gz
-    echo 'dda229e9c73f4fbb7d4324e0d993e11311673df03f73b194c554c2e9451e17cd  git-2.16.3.tar.gz' | shasum -a256 -c - && tar -xzf git-2.16.3.tar.gz
-    cd git-2.16.3/
+    curl --remote-name --progress https://www.kernel.org/pub/software/scm/git/git-2.18.0.tar.gz
+    echo '94faf2c0b02a7920b0b46f4961d8e9cad08e81418614102898a55f980fa3e7e4  git-2.18.0.tar.gz' | shasum -a256 -c - && tar -xzf git-2.18.0.tar.gz
+    cd git-2.18.0/
     ./configure
     make prefix=/usr/local all