[9fans] docs vs code

[Tim Newsham <newsham@lava.net>]

Looks like the documents and the code are out of synch on this.
On windows using the 79c970 (which shares common ethernet code
with all the windows drivers) the driver doesnt behave in the same
way as documented in the manual.

The manual says setting the type to "1" should receive all packets.
If I set the type to 1 and read, I get nothing.

The manual says that if multiple connections are of the same type,
duplicates get sent to all readers.  However, the driver seems to
only allow one connection to be bound to a given type before returning
"device or object already in use."

Tim N.