various small fixes.

. motd update (ast)
 . made /usr/local/man/man* and made them bin-owned (mtree)
   (to let bin install there)
 . made copyright notice in kernel 1987-2006 (ast)
 . added chown -R bin /usr/src so that bin can compile everything

kernel/main.c

@@ -169,7 +169,7 @@ PUBLIC void main()
 PRIVATE void announce(void)
 {
   /* Display the MINIX startup banner. */
-  kprintf("MINIX %s.%s.  Copyright 2001 Prentice-Hall, Inc.\n", 
+  kprintf("MINIX %s.%s.  Copyright 1987-2006 Prentice-Hall, Inc.\n", 
       OS_RELEASE, OS_VERSION);
 
 #if (CHIP == INTEL)