Switch to NetBSD passwd format

Based on work by Vivek Prakash and Gianluca Guida.

See UPDATING about caveats on currently existing accounts.

	. restores netbsd libc pwcache functions

nbsd_include/arch/i386/include/param.h

@@ -62,6 +62,10 @@
 #define	PGOFSET		(NBPG-1)	/* byte offset into page */
 #define	NPTEPG		(NBPG/(sizeof (pt_entry_t)))
 
+#ifndef MAXPHYS
+#define MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
+#endif
+
 /*
  * Mach derived conversion macros
  */

nbsd_include/login_cap.h

@@ -43,7 +43,9 @@
 #define	_PATH_LOGIN_CONF	"/etc/login.conf"
 
 #define	LOGIN_OSETGROUP		0x0001	/* Obsolete setgroup */
+#ifndef __minix
 #define	LOGIN_SETLOGIN		0x0002	/* Set login */
+#endif
 #define	LOGIN_SETPATH		0x0004	/* Set path */
 #define	LOGIN_SETPRIORITY	0x0008	/* Set priority */
 #define	LOGIN_SETRESOURCES	0x0010	/* Set resource limits */

nbsd_include/pwd.h

@@ -61,14 +61,6 @@
  * SUCH DAMAGE.
  */
 
-#if defined(__minix) && defined(_MINIX_COMPAT)
-#include <compat/pwd.h>
-/* Avoid inclusion of the rest of the header. */
-#ifndef _PWD_H_
-#define _PWD_H_
-#endif
-#endif /* __minix && _MINIX_COMPAT */
-
 #ifndef _PWD_H_
 #define	_PWD_H_
 

nbsd_include/sys/dirent.h

@@ -18,6 +18,7 @@ struct dirent {		/* Largest entry (8 slots) */
 };
 
 #if defined(_NETBSD_SOURCE)
+#define MAXNAMLEN	511
 #define	d_fileno	d_ino
 #endif