share_mode: 2 causes 6985 response when attempting immediate card access

[benbenbenbenbenben]

I have GP authenticate routine that fails with a delayed 6985 if it runs immediately on card-inserted.

In this particular case because the card-inserted event in my experiment is followed by an INUSE status update in shared mode, other services on my system might be accessing the card momentarily i.e. while I'm mid authentication.

This is more feature request than defect but to go some way to fix this, can we extract the share_mode so that it's user configurable?

edit: probably a good idea to add a flag to enable/disable auto connect at the same time too right?