bootstrap does not pass --force to autoreconf

[Akim Demaille]

Hi friends,

I recently realized that I was stuck with an old ylwrap.  I
thought that bootstrap was appropriately upgrading my environment
when a newer Automake was installed, but it is not the case, as
bootstrap reads:

# Tell autoreconf not to invoke autopoint or libtoolize; they were run above.
echo "running: AUTOPOINT=true LIBTOOLIZE=true " \
    "$AUTORECONF --verbose --install $no_recursive -I $m4_base $ACLOCAL_FLAGS"
AUTOPOINT=true LIBTOOLIZE=true \
    $AUTORECONF --verbose --install $no_recursive -I $m4_base $ACLOCAL_FLAGS \
  || die "autoreconf failed"

so it does not pass --force.  Maybe there are other similar
files that are kept in the past, I don't know.

Is there a reason not to pass --force?