修改key_keeper请求为post

修改key_keeper请求连接为长连接
修改HTTP2流id设置时机

common/include/tfe_proxy.h

@@ -6,6 +6,7 @@ struct tfe_proxy;
 unsigned int tfe_proxy_get_work_thread_count();
 struct event_base * tfe_proxy_get_work_thread_evbase(unsigned int thread_id);
 struct evdns_base* tfe_proxy_get_work_thread_dnsbase(unsigned int thread_id);
+struct evhttp_connection* tfe_proxy_get_work_thread_evhttp(unsigned int thread_id);
 
 struct event_base * tfe_proxy_get_gc_evbase(void);
 screen_stat_handle_t tfe_proxy_get_fs_handle(void);