SSPI related code: Unicode support for WinCE

SSPI related code now compiles with ANSI and WCHAR versions of security
methods (WinCE requires WCHAR versions of methods).

Pulled UTF8 to WCHAR conversion methods out of idn_win32.c into their own file.

curl_sasl.c - include curl_memory.h to use correct memory functions.

getenv.c and telnet.c - WinCE compatibility fix

With some committer adjustments

lib/curl_multibyte.h

@@ -0,0 +1,40 @@
+#ifndef HEADER_CURL_MULTIBYTE_H
+#define HEADER_CURL_MULTIBYTE_H
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2012, 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
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+#include "setup.h"
+
+#if defined(USE_WIN32_IDN) || \
+   (defined(USE_WINDOWS_SSPI) && (defined(_WIN32_WCE) || defined(UNICODE)))
+
+ /*
+  * MultiByte conversions using Windows kernel32 library.
+  */
+
+#include <tchar.h>
+
+wchar_t *Curl_convert_UTF8_to_wchar(const char *str_utf8);
+const char *Curl_convert_wchar_to_UTF8(const wchar_t *str_w);
+
+#endif /* USE_WIN32_IDN || (USE_WINDOWS_SSPI && (_WIN32_WCE || UNICODE)) */
+
+#endif /* HEADER_CURL_MULTIBYTE_H */