refers to tgz files or to a directory in which tgz files have already
been extracted, make it an error for the files that should have come
from etc.tgz to be missing. This is intended to prevent users from
accidentally deleting necessary files when they run "postinstall -s
xetc.tgz fix".
Use the absence of .../etc/mtree/set.etc in the extracted directory
as a test for the error case.
files. (It was already possible to use several -s options.)
* Change man page to refer to "-s tgzdir" instead of "-s tempdir",
to reduce confusion between tempdir and temproot.
* Always use a temproot directory, even if passed "-s tgzdir".
* Always invoke "postinstall check", even when not using a source dir.
* Add a BUGS section saying that using -s srcdir is not recommended.
Reviewed by lukem and martti.
* Expand the "-s" flag to -s {srcdir|tgzfile|tempdir}.
* Deprecate the "-b" flag. It is replaced by "-s tempdir".
* Change "-s srcdir" to refer to the top of the source tree (e.g.
/usr/src) instead of the etc subdirectory.
In etcupdate's interactive phase, enhance the "s" command to be able
to invoke alternative diff commands.
Also some style changes.
Approved by christos
