Patrick Monnerat and I modified libcurl so that now it *copies* all strings

passed to it with curl_easy_setopt()! Previously it has always just refered
to the data, forcing the user to keep the data around until libcurl is done
with it. That is now history and libcurl will instead clone the given
strings and keep private copies.

lib/transfer.c

@@ -233,7 +233,7 @@ CURLcode Curl_readrewind(struct connectdata *conn)
   /* We have sent away data. If not using CURLOPT_POSTFIELDS or
      CURLOPT_HTTPPOST, call app to rewind
   */
-  if(data->set.postfields ||
+  if(data->set.str[STRING_POSTFIELDS] ||
      (data->set.httpreq == HTTPREQ_POST_FORM))
     ; /* do nothing */
   else {
@@ -992,7 +992,7 @@ CURLcode Curl_readwrite(struct connectdata *conn,
             }
 
             else if (checkprefix("Content-Encoding:", k->p) &&
-                     data->set.encoding) {
+                     data->set.str[STRING_ENCODING]) {
               /*
                * Process Content-Encoding. Look for the values: identity,
                * gzip, deflate, compress, x-gzip and x-compress. x-gzip and