Libraries updates and cleanup

* Updating common/lib
 * Updating lib/csu
 * Updating lib/libc
 * Updating libexec/ld.elf_so
 * Corrected test on __minix in featuretest to actually follow the
   meaning of the comment.
 * Cleaned up _REENTRANT-related defintions.
 * Disabled -D_REENTRANT for libfetch
 * Removing some unneeded __NBSD_LIBC defines and tests

Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2

lib/libc/gen/_warnx.c

@@ -1,4 +1,4 @@
-/*	$NetBSD: _warnx.c,v 1.10 2005/09/13 01:44:09 christos Exp $	*/
+/*	$NetBSD: _warnx.c,v 1.11 2011/07/17 20:54:34 joerg Exp $	*/
 
 /*
  * J.T. Conklin, December 12, 1994
@@ -7,7 +7,7 @@
 
 #include <sys/cdefs.h>
 #if defined(LIBC_SCCS) && !defined(lint)
-__RCSID("$NetBSD: _warnx.c,v 1.10 2005/09/13 01:44:09 christos Exp $");
+__RCSID("$NetBSD: _warnx.c,v 1.11 2011/07/17 20:54:34 joerg Exp $");
 #endif /* LIBC_SCCS and not lint */
 
 #if defined(__indr_reference)
@@ -16,7 +16,7 @@ __indr_reference(_warnx, warnx)
 
 #include <stdarg.h>
 
-void _vwarnx(const char *, _BSD_VA_LIST_);
+void _vwarnx(const char *, va_list);
 
 void
 warnx(const char *fmt, ...)