Kjetil Jacobsen's patch that introduces CURLOPT_PRIVATE and CURLINFO_PRIVATE

for storage and retrieval of private data in the curl handle.

lib/urldata.h

@@ -686,6 +686,8 @@ struct UserDefined {
 
   int dns_cache_timeout; /* DNS cache timeout */
   long buffer_size;      /* size of receive buffer to use */
+
+  char *private; /* Private data */
   
 /* Here follows boolean settings that define how to behave during
    this session. They are STATIC, set by libcurl users or at least initially