Include <limits.h> unconditionally, since other

files have been getting away with it for years (MORE/BSD 4.3
is extinct now).

lib/pathmax.h

@@ -22,12 +22,7 @@
 #  include <unistd.h>
 # endif
 
-/* Non-POSIX BSD systems might have gcc's limits.h, which doesn't define
-   PATH_MAX but might cause redefinition warnings when sys/param.h is
-   later included (as on MORE/BSD 4.3).  */
-# if defined _POSIX_VERSION || !defined __GNUC__
-#  include <limits.h>
-# endif
+# include <limits.h>
 
 # ifndef _POSIX_PATH_MAX
 #  define _POSIX_PATH_MAX 256