apache-frontend: Fix various bugs and add unforgivable line

software/apache-frontend/apache-yakari.cfg.in

 {% set cached_server_dict = {} -%}
 {% set part_list = [] -%}
+{% set TRUE_VALUES = ['y', 'yes', '1', 'true'] -%}
 {% set generic_instance_parameter_dict = {'cache_access': cache_access,} -%}
 [jinja2-template-base]
 recipe = slapos.recipe.template:jinja2
@@ -28,10 +29,12 @@ context =
 {%   set access_log = '/'.join([apache_log_directory, '%s_access_log' % slave_reference]) -%}
 {%   set error_log = '/'.join([apache_log_directory, '%s_error_log' % slave_reference]) -%}
 # The slave use cache
-{%   if 'enable_cache' in slave_instance -%}
+# Next line is forbidden and people who copy it will be hanged short
+{%   set enable_cache = ('' ~ slave_instance.get('enable_cache', '')).lower() in TRUE_VALUES -%}
+{%   if enable_cache -%}
 {%     do cached_server_dict.__setitem__(slave_instance.get('domain'), slave_instance.get('url')) -%}
-{%   endif -%}
 {%     do slave_instance.__setitem__('url', cache_access) -%}
+{%   endif -%}
 {%   do part_list.append(slave_section_title) -%}
 # Set up slave configuration file
 [{{ slave_section_title }}]

software/apache-frontend/default-virtualhost.conf.in

+{% set TRUE_VALUES = ['y', 'yes', '1', 'true'] -%}
 <VirtualHost *:{{ http_port }}>
-  ServerName {{ slave_parameter.get('domain', '') }}
-  ServerAlias {{ slave_parameter.get('domain', '') }}
+  ServerName {{ slave_parameter.get('domain') }}
+  ServerAlias {{ slave_parameter.get('domain') }}
   SSLEngine on
   SSLProxyEngine on
   # Rewrite part
@@ -25,12 +26,13 @@
 {% endif -%}
   # If nothing exist : put a nice error
 #  ErrorDocument 404 /notfound.html
+# Dadiboom
 
 </VirtualHost>
 
 <VirtualHost *:{{ https_port }}>
-  ServerName {{ slave_parameter.get('domain', '') }}
-  ServerAlias {{ slave_parameter.get('domain', '') }}
+  ServerName {{ slave_parameter.get('domain') }}
+  ServerAlias {{ slave_parameter.get('domain') }}
   SSLProxyEngine on
   # Rewrite part
   ProxyVia On
@@ -47,7 +49,9 @@
   # Remove "Secure" from cookies, as backend may be https
   Header edit Set-Cookie "(?i)^(.+);secure$" "$1"
 
-{% if 'https-only' in slave_parameter -%}
+# Next line is forbidden and people who copy it will be hanged short
+{% set https_only = ('' ~ slave_parameter.get('https-only', '')).lower() in TRUE_VALUES -%}
+{% if https_only in slave_parameter -%}
   # Not using HTTPS? Ask that guy over there.
   # Dummy redirection to https. Note: will work only if https listens
   # on standard port (443).

software/apache-frontend/instance.cfg

@@ -65,7 +65,7 @@ custom-group = $${dynamic-custom-group-template-slave-list:rendered}
 [instance-parameter]
 # Fetches parameters defined in SlapOS Master for this instance.
 # Always the same.
-recipe = slapos.cookbook:slapconfiguration
+recipe = slapos.cookbook:slapconfiguration.serialised
 computer = $${slap_connection:computer_id}
 partition = $${slap_connection:partition_id}
 url = $${slap_connection:server_url}
@@ -106,7 +106,7 @@ extra-context =
 [dynamic-custom-personal-template-slave-list]
 < = jinja2-template-base
 template = ${template-slave-list:target}
-filename = instance-slave-list.cfg
+filename = custom-personal-instance-slave-list.cfg
 extensions = jinja2.ext.do
 extra-context =
     key apache_configuration_directory apache-directory:slave-configuration
@@ -125,7 +125,7 @@ extra-context =
 [dynamic-custom-group-template-slave-list]
 < = jinja2-template-base
 template = ${template-custom-slave-list:target}
-filename = instance-slave-list.cfg
+filename = custom-group-instance-slave-list.cfg
 extensions = jinja2.ext.do
 extra-context =
     key apache_configuration_directory apache-directory:slave-configuration
@@ -145,7 +145,7 @@ extra-context =
 [dynamic-default-template-slave-list]
 < = jinja2-template-base
 template = ${template-custom-slave-list:target}
-filename = instance-slave-list.cfg
+filename = default-instance-slave-list.cfg
 extensions = jinja2.ext.do
 extra-context =
     key apache_configuration_directory apache-directory:slave-configuration