【1】修复HTTP Expect头部缺失时POST卡顿的问题；

【2】TODO：尝试增加multiple delete objects API，尚未成功（AccessDenied）；

cache/tango_cache_xml.h

@@ -4,7 +4,9 @@
 #include "tango_cache_client_in.h"
 
 bool parse_uploadID_xml(const char *content, int len, char **uploadID);
-int construct_complete_xml(struct tango_cache_ctx *ctx, char **xml, int *len);
+void construct_complete_xml(struct tango_cache_ctx *ctx, char **xml, int *len);
+void construct_multiple_delete_xml(const char *bucket, char *key[], u_int32_t num, int is_hash, char **xml, size_t *len);
+bool parse_multidelete_xml(const char *xml, int len, u_int32_t *errnum, char *errstr, int size);
 
 #endif