We also introduce a 'gsup_router' which enables us to route
a transaction to a given VLR. It works based on the SERIAL attribute
communicated at time of the IPA multiplex setup as part of the CCM
sub-protocol.
SQLite has this crappy type system where you can put a string into
a boolean or integer column, which of course will break once you try to
read it as bool..
Also, add an index by IMSI to the SUBSCRIBER table.
Harald Welte