Issue 245 - Unify SSL configuration for all servers

modules/nginx/templates/site.erb

 <% include_file = lambda do |url| %>
   <% content = Puppet::FileServing::Content.indirection.find(url) %>
   <% if content %>
     <%= content.content %>
   <% else %>
     <% raise StandardError, "Failed to resolve source URL #{url}" %>
   <% end %>
 <% end %>
 
 <% server_name = lambda do |domain, alt_names| %><%= domain %><% @alt_names.each do |name| %>, <%= name %><% end %><% end %>
 
 <% if global_config %>
   <%= @global_config %>
 <% end %>
 
 <% if @certificate and @private_key %>
-  server {
+  server
+  {
     server_name <% server_name[domain, alt_names] %>;
 
     <% if is_default %>
       listen 80 default_server;
       listen [::]:80 default_server;
     <% else %>
       listen 80;
       listen [::]:80;
     <% end %>
 
-    location / {
+    location /
+    {
       rewrite (.*) https://$host$1 permanent;
     }
   }
-  server {
+  server
+  {
     server_name <% server_name[domain, alt_names] %>;
 
     <% if is_default %>
       listen 443 ssl spdy default_server;
       listen [::]:443 ssl spdy default_server;
     <% else %>
       listen 443 ssl spdy;
       listen [::]:443 ssl spdy;
     <% end %>
 
     ssl_certificate <%= certificate %>;
     ssl_certificate_key <%= private_key %>;
 
     add_header Strict-Transport-Security max-age=31536000;
 <% else %>
-  server {
+  server
+  {
     server_name <% server_name[domain, alt_names] %>;
 
     <% if is_default %>
       listen 80 default_server;
       listen [::]:80 default_server;
     <% else %>
       listen 80;
       listen [::]:80;
     <% end %>
 <% end %>
 
 access_log /var/log/nginx/<%= log %> main;
 
+# redirect server error pages to the static page /50x.html
+#
+error_page 500 502 503 504 /50x.html;
+location = /50x.html
+{
+  root /usr/share/nginx/html;
+}
+
 <% if @content %>
   <%= content %>
 <% end %>
 
 <% if @source %>
   <% include_file[source] %>
 <% end %>
 }