* libmisc/copydir.c: Added splint annotations.

	* libmisc/copydir.c: Added splint annotations.
	* libmisc/copydir.c: Added assert to help splint.
	* libmisc/copydir.c: Free allocated structures in cas of failure.
	* libmisc/copydir.c: Avoid implicit conversion of pointers to
	booleans.
	* libmisc/copydir.c: Use buffers of size PATH_MAX instead of 1024
	for filenames.
	* libmisc/copydir.c: Use fchmod and fchown to change the mode of
	the opened file.
	* libmisc/copydir.c: Indicate the mode to open(), even if we chmod
	later.