include strtok.h to get the prototype

lib/cookie.c

@@ -86,6 +86,7 @@ Example set of cookies:
 #include "cookie.h"
 #include "getdate.h"
 #include "strequal.h"
+#include "strtok.h"
 
 /* The last #include file should be: */
 #ifdef MALLOCDEBUG

lib/netrc.c

@@ -41,6 +41,7 @@
 #include <curl/curl.h>
 
 #include "strequal.h"
+#include "strtok.h"
 
 /* The last #include file should be: */
 #ifdef MALLOCDEBUG

lib/strtok.h

@@ -30,6 +30,8 @@
 #ifndef HAVE_STRTOK_R
 char *Curl_strtok_r(char *s, const char *delim, char **last);
 #define strtok_r Curl_strtok_r
+#else
+extern char *strtok_r(char *s1, const char *s2, char **lasts);
 #endif
 
 #endif

lib/url.c

@@ -91,6 +91,7 @@
 #include "cookie.h"
 #include "strequal.h"
 #include "escape.h"
+#include "strtok.h"
 
 /* And now for the protocols */
 #include "ftp.h"