MFH: call ap_set_content_type() only once, else each time we call it,

configured output filters for that content type will be added

sapi/apache2handler/php_apache.h

@@ -44,6 +44,8 @@ typedef struct php_struct {
 #endif
 	/* Whether or not we've processed PHP in the output filters yet. */
 	int request_processed;
+	/* final content type */
+	char *content_type;
 } php_struct;
 
 void *merge_php_config(apr_pool_t *p, void *base_conf, void *new_conf);