LISP: update documentation for "null" ports

Since commit 0ad90c8 it is possible to set tunnel destination IP address
in the flow.  This allows creating a LISP "map-cache" in the flow table.
Update the LISP documentation to reflect these possibilities.

Signed-off-by: Lorand Jakab <lojakab@cisco.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
BFD: Reconfigure BFD on port deletion.

Invoke the function to reconfigure BFD when a port/interface
is deleted.

Signed-off-by: Pavithra Ramesh <paramesh@vmware.com>
Signed-off-by: Ethan Jackson <ethan@nicira.com>
netdev-dummy: Limit receive queue length to 100 packets.

It doesn't seem like a good idea to allow the queue length to grow without
bound, even for a test-only device.

Signed-off-by: Ben Pfaff <blp@nicira.com>
netdev-dummy: Factor some netdev_dummy_receive() code out into new function.

An upcoming patch will add another user.

Signed-off-by: Ben Pfaff <blp@nicira.com>
netdev-dummy: Drop "nobody listened" reply from netdev-dummy/receive.

Ethan pointed out that this wasn't very useful.

Signed-off-by: Ben Pfaff <blp@nicira.com>
netdev-dummy: Add "pstream" option for connecting a dummy to a process.

Signed-off-by: Ben Pfaff <blp@nicira.com>
tests: Add support for running OFTest.

Signed-off-by: Ben Pfaff <blp@nicira.com>