Moved web services tutorials

Author: javiereguiluz

redirection_map

@@ -237,4 +237,5 @@
 /cookbook/validation/custom_constraint /validation/custom_constraint
 /cookbook/validation/group_service_resolver /validation/group_service_resolver
 /cookbook/validation/severity /validation/severity
-/cookbook/web_server/built_in /web_server/built_in
+/cookbook/web_server/built_in /web_server/built_in
+/cookbook/web_services/php_soap_extension /web_services/php_soap_extension