etcupdate now has the ability to use a binary set file, and the "-s"
flag has been changed to allow any of

    -s srcdir
	   A directory that contains a NetBSD source tree;
    -s tgzfile
	   A distribution set file such as "etc.tgz" or "xetc.tgz";
    -s tempdir
	   A temporary directory in which one or both of "etc.tgz"
	   and "xetc.tgz" have been extracted.

For example, you can say

    etcupdate -s /wherever/etc.tgz -s /wherever/xetc.tgz

and it will unpack those tgz files into a temporary directory
before doing the rest of the work.

The old "-b tempdir" flag is deprecated (but still works, with a warning
message).  Use "-s tempdir" instead.

The "-s srcdir" flag has been changed to refer to the top level
directory, not to the etc subdirectory.  For example, use "-s /usr/src"
rather than the old "-s /usr/src/etc".  (The old way still works, with a
warning message.)

--apb (Alan Barrett)