apache-frontend: fix apache_custom_http option

The exposed apache_custom_http option for custom slave was
incorrectly missing, and apache_custom_http*s* was used instead.

software/apache-frontend/buildout.hash.cfg

@@ -31,7 +31,7 @@ md5sum = 24e514ad6f15859229db46f24a8cd280
 
 [template-slave-configuration]
 filename = templates/custom-virtualhost.conf.in
-md5sum = d103143e5d50682bd5ad43117d82e2fa
+md5sum = b3d5a3573fa381fec954ad5cbf1575a0
 
 [template-replicate-publish-slave-information]
 filename = templates/replicate-publish-slave-information.cfg.in

software/apache-frontend/templates/custom-virtualhost.conf.in

@@ -3,5 +3,5 @@
 </VirtualHost>
 
 <VirtualHost *:{{ http_port }}>
-{{ slave_parameter.get('apache_custom_https', '') }}
+{{ slave_parameter.get('apache_custom_http', '') }}
 </VirtualHost>