增加HTTP业务层和缓存运行状态统计。业务层状态输出到tfe.fieldstat，缓存输出到cache.fieldstat。增加缓存开关。

platform/include/internal/ssl_stream.h

@@ -8,13 +8,12 @@
 #include <openssl/x509.h>
 #include <openssl/x509v3.h>
 
-#include <MESA/field_stat2.h>
 
 struct ssl_stream;
 
 struct ssl_mgr;
 struct ssl_mgr * ssl_manager_init(const char * ini_profile, const char * section, struct event_base * ev_base_gc,
-	void * logger, screen_stat_handle_t fs);
+	void * logger);
 void ssl_manager_destroy(struct ssl_mgr * mgr);
 
 struct ssl_stream * ssl_upstream_create_result_release_stream(future_result_t * result);