Merge branch 'bozaro/gitlab-shell-git-lfs-authenticate'

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

CHANGELOG

 v2.6.6 (unreleased)
   - Do not clean LANG environment variable for the git hooks when working through the SSH-protocol
+  - Add git-lfs-authenticate command to white list (this command is used by git-lfs for SSO authentication through SSH-protocol)
 
 v2.6.5
   - Handle broken symlinks in create-hooks

lib/gitlab_shell.rb

@@ -111,6 +111,8 @@ class GitlabShell
 
       $logger.info "gitlab-shell: executing git-annex command <#{parsed_args.join(' ')}> for #{log_username}."
       exec_cmd(*parsed_args)
+    elsif @git_cmd == 'git-lfs-authenticate'
+      exec_cmd(@origin_cmd)
     else
       $logger.info "gitlab-shell: executing git command <#{@git_cmd} #{repo_full_path}> for #{log_username}."
       exec_cmd(@git_cmd, repo_full_path)