connmgr: Fix a typo.

Signed-off-by: Alex Wang <alexw@nicira.com>
Acked-by: Andy Zhou <azhou@nicira.com>
connmgr: Make call to connmgr_wants_packet_in_on_miss() thread safe.

connmgr_wants_packet_in_on_miss() is called by multiple threads
and thusly should be protected by the mutex.

Signed-off-by: Alex Wang <alexw@nicira.com>
Acked-by: Andy Zhou <azhou@nicira.com>
Acked-by: Ethan Jackson <ethan@nicira.com>