fixup! gitlab: 8.0.5 -> 8.5.0, service improvements

gitlab-shell is now talking over the unix socket to gitlab, so the TCP
port isn't needed anymore.

nixos/modules/services/misc/defaultUnicornConfig.rb

···
 pid ENV["UNICORN_PATH"] + "/tmp/pids/unicorn.pid"
 
 listen ENV["UNICORN_PATH"] + "/tmp/sockets/gitlab.socket", :backlog => 1024
-listen "127.0.0.1:8080", :tcp_nopush => true
 
 timeout 60
 

nixos/modules/services/misc/gitlab.nix

···
 
   gemHome = "${pkgs.gitlab.env}/${ruby.gemPath}";
 
+  gitlabSocket = "${cfg.statePath}/tmp/sockets/gitlab.socket";
+  pathUrlQuote = url: replaceStrings ["/"] ["%2F"] url;
+
   databaseYml = ''
     production:
       adapter: postgresql
···
 
   gitlabShellYml = ''
     user: ${cfg.user}
-    gitlab_url: "http://localhost:8080/"
+    gitlab_url: "http+unix://${pathUrlQuote gitlabSocket}"
     http_settings:
       self_signed_cert: false
     repos_path: "${cfg.statePath}/repositories"
···
           + "-listenUmask 0 "
           + "-listenNetwork unix "
           + "-listenAddr /run/gitlab/gitlab-workhorse.socket "
-          + "-authSocket ${cfg.statePath}/tmp/sockets/gitlab.socket "
+          + "-authSocket ${gitlabSocket} "
           + "-documentRoot ${pkgs.gitlab}/share/gitlab/public";
       };
     };