- Balint Szilakszi reported a memory leak when libcurl did gzip decompression

of streams that had some parts (legitimately) missing. We now provide and use
  a proper cleanup function for the content encoding submodule.
  http://curl.haxx.se/mail/lib-2009-05/0092.html

lib/content_encoding.h

@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2009, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -29,8 +29,11 @@
  */
 #ifdef HAVE_LIBZ
 #define ALL_CONTENT_ENCODINGS "deflate, gzip"
+/* force a cleanup */
+void Curl_unencode_cleanup(struct connectdata *conn);
 #else
 #define ALL_CONTENT_ENCODINGS "identity"
+#define Curl_unencode_cleanup(x)
 #endif
 
 CURLcode Curl_unencode_deflate_write(struct connectdata *conn,
@@ -42,4 +45,5 @@ Curl_unencode_gzip_write(struct connectdata *conn,
                          struct SingleRequest *k,
                          ssize_t nread);
 
+
 #endif