(ENCODE_FILE): New macro.

(ENCODE_FILE): New macro.
(Vfile_name_coding_system): New variable.
(syms_of_fileio): Set up Lisp variable.
(Fset_visited_file_modtime): Use ENCODE_FILE.
(Fcopy_file, Fmake_directory_internal, Fdelete_directory, Fdelete_file)
(Frename_file, Fadd_name_to_file, Ffile_exists_p Ffile_executable_p)
(Ffile_readable_p, Ffile_writable_p, Faccess_file, Ffile_symlink_p)
(Ffile_directory_p, Ffile_accessible_directory_p, Ffile_regular_p)
(Ffile_modes, Fset_file_modes, Ffile_newer_than_file_p, Fwrite_region)
(Finsert_file_contents, Fverify_visited_file_modtime): Likewise.

(Ffile_symlink_p): Decode the file name value.