It does not belong in the curlx_ name space as it is never used
externally.
Closes #10132
#if defined(_WIN32_WCE)
#define system_strdup _strdup
#elif !defined(HAVE_STRDUP)
-#define system_strdup curlx_strdup
+#define system_strdup Curl_strdup
#else
#define system_strdup strdup
#endif
#include "memdebug.h"
#ifndef HAVE_STRDUP
-char *curlx_strdup(const char *str)
+char *Curl_strdup(const char *str)
{
size_t len;
char *newstr;
#include "curl_setup.h"
#ifndef HAVE_STRDUP
-extern char *curlx_strdup(const char *str);
+char *Curl_strdup(const char *str);
#endif
#ifdef WIN32
wchar_t* Curl_wcsdup(const wchar_t* src);