use thread_local for ntoa buf

@@ -108,21 +108,23 @@
  *
  * Reentrant interface
  */
 
 #include "lint.h"
-#include "thr_uberdata.h"
 
 #include <sys/types.h>
 
 #include <netinet/in.h>
 
 #include <ctype.h>
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <threads.h>
 
+static thread_local char ntoa_buf[18];
+
 char *
 inet_ntoa_r(struct in_addr in, char b[])
 {
         char    *p;
 

@@ -134,11 +136,11 @@
 }
 
 char *
 inet_ntoa(struct in_addr in)
 {
-        return (inet_ntoa_r(in, curthread->ul_ntoabuf));
+        return (inet_ntoa_r(in, ntoa_buf));
 }
 
 /*
  * Check whether "cp" is a valid ascii representation
  * of an Internet address and convert to a binary address.