connect.c: remove UA whitelist and just consume up to 10 UAs before failing

Lets not use a whitelist of UnitAttentions that we consume during the connect
phase. Instead we can just loop and fail after the 10th.
If there are more than 10 UAs then we have a problem, otherwise
just consume them all, forget them  and then pass control back to the caller.

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>