Include <sys/types.h> and <limits.h> ourselves, don't assume they are included

through <pthread.h>.

gen/sem.c:		Prerequisite for <_semaphore.h>
net/getprotoent.c:	USHRT_MAX
net/getservent.c:	USHRT_MAX
stdio/ungetwc.c:	MB_LEN_MAX
stdio/vfwscanf.c:	MB_LEN_MAX

lib/libc/gen/sem.c

@@ -57,6 +57,7 @@
  * sem_post() may need to be wrapped to be signal-safe.
  */
 #include "namespace.h"
+#include <sys/types.h>
 #include <sys/queue.h>
 #include <errno.h>
 #include <fcntl.h>

lib/libc/net/getprotoent.c

@@ -39,6 +39,7 @@ __FBSDID("$FreeBSD$");
 
 #include <sys/types.h>
 #include <sys/socket.h>
+#include <limits.h>
 #include <netdb.h>
 #include <stdio.h>
 #include <stdlib.h>

lib/libc/net/getservent.c

@@ -40,6 +40,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <arpa/inet.h>
+#include <limits.h>
 #include <netdb.h>
 #include <stdio.h>
 #include <string.h>

lib/libc/stdio/ungetwc.c

@@ -29,6 +29,7 @@ __FBSDID("$FreeBSD$");
 
 #include "namespace.h"
 #include <errno.h>
+#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <wchar.h>

lib/libc/stdio/vfwscanf.c

@@ -45,6 +45,7 @@ __FBSDID("$FreeBSD$");
 #include "namespace.h"
 #include <ctype.h>
 #include <inttypes.h>
+#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <stddef.h>