Append all rewrite module options to http as well.

slapos/recipe/apache_frontend/template/apache.conf.in

@@ -128,16 +128,20 @@ Header append Vary User-Agent
   ErrorDocument 404 /notfound.html
 </VirtualHost>
 
+
+# Only accept generic (i.e not Zope) backends on http
 <VirtualHost *:%(plain_http_port)s>
-  RewriteEngine On
   SSLProxyEngine on
+  # Rewrite part
+  ProxyVia On
   ProxyPreserveHost On
+  ProxyTimeout 600
+  RewriteEngine On
 
   # Include configuration file not operated by slapos. This file won't be erased
   # or changed when slapgrid is ran. It can be freely customized by node admin.
   Include %(custom_apache_virtualhost_conf)s
 
-  # We accept generic (i.e not Zope) backends on http
   RewriteMap apachemapgeneric txt:%(apachemap_path)s
   RewriteCond ${apachemapgeneric:%%{SERVER_NAME}} >""
   RewriteRule ^/(.*)$ ${apachemapgeneric:%%{SERVER_NAME}}/$1 [L,P]
@@ -148,6 +152,7 @@ Header append Vary User-Agent
   RewriteRule ^/(.*)$ https://%%{SERVER_NAME}%%{REQUEST_URI}
 </VirtualHost>
 
+
 # Include configuration file not operated by slapos. This file won't be erased
 # or changed when slapgrid is ran. It can be freely customized by node admin.
 Include %(custom_apache_conf)s