Move _POSIX_THREADS to the right place and define a few other symbolic

constants for the features we gained with the merge of the nathanw_sa
branch.

Ok'd by thorpej.

Closes my PR 19930.

lib/libpthread/pthread.h

@@ -1,4 +1,4 @@
-/*	$NetBSD: pthread.h,v 1.5 2003/01/19 19:21:49 wiz Exp $	*/
+/*	$NetBSD: pthread.h,v 1.6 2003/01/19 19:41:44 skrll Exp $	*/
 
 /*-
  * Copyright (c) 2001 The NetBSD Foundation, Inc.
@@ -176,8 +176,6 @@ __END_DECLS
  */
 #define PTHREAD_CANCELED	((void *) 1)
 
-#define	_POSIX_THREADS
-
 #define PTHREAD_DESTRUCTOR_ITERATIONS	4	/* Min. required */
 #define PTHREAD_KEYS_MAX	256
 #define PTHREAD_STACK_MIN	4096 /* XXX Pulled out of my butt */

sys/sys/unistd.h

@@ -1,4 +1,4 @@
-/*	$NetBSD: unistd.h,v 1.21 2002/12/19 23:31:57 kleink Exp $	*/
+/*	$NetBSD: unistd.h,v 1.22 2003/01/19 19:41:47 skrll Exp $	*/
 
 /*
  * Copyright (c) 1989, 1993
@@ -85,7 +85,16 @@
 #define	_POSIX_MEMORY_PROTECTION 1
 				/* monotonic clock */
 #define	_POSIX_MONOTONIC_CLOCK	200112L
-
+				/* threads */
+#define	_POSIX_THREADS		200112L
+				/* barriers */
+#define	_POSIX_BARRIERS		200112L
+				/* timers */
+#define	_POSIX_TIMERS		200112L
+				/* spin locks */
+#define	_POSIX_SPIN_LOCKS	200112L
+				/* reader/writer locks */
+#define	_POSIX_READER_WRITER_LOCKS	200112L
 
 /* access function */
 #define	F_OK		0	/* test for existence of file */