fix old references to on_path

README.md

@@ -36,7 +36,7 @@ using `http_parser_init()` and set the callbacks. That might look something
 like this for a request parser:
 
     http_parser_settings settings;
-    settings.on_path = my_path_callback;
+    settings.on_url = my_url_callback;
     settings.on_header_field = my_header_field_callback;
     /* ... */
 

http_parser.h

@@ -77,7 +77,7 @@ typedef struct http_parser_settings http_parser_settings;
  * chunked' headers that indicate the presence of a body.
  *
  * http_data_cb does not return data chunks. It will be call arbitrarally
- * many times for each string. E.G. you might get 10 callbacks for "on_path"
+ * many times for each string. E.G. you might get 10 callbacks for "on_url"
  * each providing just a few characters more data.
  */
 typedef int (*http_data_cb) (http_parser*, const char *at, size_t length);