connector: get test code working by default

The connector test code currently does not work out of the box.  This is
because it uses a connector id that is above the registered limit.  So
rather than force people to stumble through undocumented code wondering
why it isn't working, have the test code use one of the "private" ids by
default.  While I'm in here, clean up the code (kernel and user app) so
that it's a bit more user friendly and verbose in significant things that
it does.  Terse test code wastes people time as they simply enumerate it
with all the same kind of debug messages to get a better feel of what code
is running at any time.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David S. Miller <davem@davemloft.net>