md_pinpad_dlg_allow_cancel now defines whether or not the user is asked
before verifying the PIN on the PIN pad. This can be denied without
interaction with the PIN pad. A checkbox in the dialog allows the user
to change this setting, which is saved in the registry by the path of
the process.
This change fixes the progress bar to match the actual configured
timout. The progressbar now fills instead of running empty, which seemed
less frightening for most users.
This change also fixes some copy/paste errors in the documentation of
opensc.conf(5).