I would like to report what seems like a problem with the driver. It
doesn't seem possible to override the default user name for
authentication by GSSAPI. I'm using a map in pg_ident.conf since my
Active Directory user name isn't the same as my Postgresql user name.
pgAdmin III and psql allow for this, the former by setting Username in
the GUI to my Postgresql user name and the latter by specifying the -U