mke2fs: add an option in mke2fs.conf to proceed after a delay

If mke2fs needs to ask the user for permission, and the user doesn't
type anything the specified delay in the /etc/mke2fs.conf file,
proceed as if the user had said yes.  The default is to do what we
currently do, which is to wait until the user answers the question one
way or the other.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
5 files changed