Expose HTTP header boundary

http_parser.c

@@ -638,6 +638,7 @@ size_t http_parser_execute (http_parser *parser,
     ch = *p;
 
     if (PARSING_HEADER(parser->state)) {
+      ++parser->boundary;
       ++parser->nread;
       /* Buffer overflow attack */
       if (parser->nread > HTTP_MAX_HEADER_SIZE) {
@@ -1902,6 +1903,7 @@ http_parser_init (http_parser *parser, enum http_parser_type t)
   parser->data = data;
   parser->type = t;
   parser->state = (t == HTTP_REQUEST ? s_start_req : (t == HTTP_RESPONSE ? s_start_res : s_start_req_or_res));
+  parser->boundary = 0;
   parser->http_errno = HPE_OK;
 }
 

http_parser.h

@@ -212,6 +212,7 @@ struct http_parser {
   uint64_t content_length; /* # bytes in body (0 if no Content-Length header) */
 
   /** READ-ONLY **/
+  uint32_t boundary;
   unsigned short http_major;
   unsigned short http_minor;
   unsigned short status_code; /* responses only */