cpio zaps mod times under 4.2bsd

[Guy Harris]

Also note that this same bug (mod times getting set to 0 by programs which
falsely assume that "st_atime" and "st_mtime" are adjacent) appears in the
USG "pack"/"pcat"/"unpack" suite and USG "file" command.  Furthermore, note that
while the V7 manual explicitly gives the format of the "stat" structure, the
S3 and later manuals only list a set of fields which are in the "stat"
structure; I infer from this a warning that programs which depend explicitly on
the layout of the "stat" structure are sinful.

	Guy Harris
	{seismo,ihnp4,allegra}!rlgvax!guy