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This commit got lost https://github.com/gitlabhq/gitlab-recipes/commit/76ba45246e93e9c764580fe54ccfe38da751afbe

lib/support/nginx/gitlab

@@ -9,6 +9,7 @@ upstream gitlab {
 server {
   listen YOUR_SERVER_IP:80 default_server;         # e.g., listen 192.168.1.1:80; In most cases *:80 is a good idea
   server_name YOUR_SERVER_FQDN;     # e.g., server_name source.example.com;
+  server_tokens off;     # don't show the version number, a security best practice
   root /home/git/gitlab/public;
   # individual nginx logs for this gitlab vhost