Fix curl_copy_handle() with CURLINFO_HEADER_OUT

The CURLOPT_DEBUGDATA will point to the old curl handle after
copying. Update it to point to the new handle.

We don't separately store whether CURLINFO_HEADER_OUT is enabled,
so I'm doing this unconditionally. It should be harmless if
CURLOPT_DEBUGFUNCTION is not used.

Author: nikic

ext/curl/interface.c

@@ -2074,6 +2074,7 @@ void _php_setup_easy_copy_handlers(php_curl *ch, php_curl *source)
 	curl_easy_setopt(ch->cp, CURLOPT_FILE,              (void *) ch);
 	curl_easy_setopt(ch->cp, CURLOPT_INFILE,            (void *) ch);
 	curl_easy_setopt(ch->cp, CURLOPT_WRITEHEADER,       (void *) ch);
+	curl_easy_setopt(ch->cp, CURLOPT_DEBUGDATA,         (void *) ch);
 
 	if (source->handlers->progress) {
 		ch->handlers->progress = ecalloc(1, sizeof(php_curl_progress));

ext/curl/tests/curl_copy_handle_basic_009.phpt

@@ -0,0 +1,29 @@
+--TEST--
+Test curl_copy_handle() with CURLINFO_HEADER_OUT
+--SKIPIF--
+<?php include 'skipif.inc'; ?>
+--FILE--
+<?php
+  include 'server.inc';
+  $host = curl_cli_server_start();
+
+  $url = "{$host}/get.inc";
+  $ch = curl_init($url);
+
+  curl_setopt($ch, CURLINFO_HEADER_OUT, 1);
+  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+  $ch2 = curl_copy_handle($ch);
+  echo curl_exec($ch), PHP_EOL;
+  var_dump(strstr(curl_getinfo($ch, CURLINFO_HEADER_OUT), "\r", true));
+  unset($ch);
+  echo curl_exec($ch2), PHP_EOL;
+  var_dump(strstr(curl_getinfo($ch2, CURLINFO_HEADER_OUT), "\r", true));
+
+?>
+--EXPECT--
+Hello World!
+Hello World!
+string(21) "GET /get.inc HTTP/1.1"
+Hello World!
+Hello World!
+string(21) "GET /get.inc HTTP/1.1"