Add support for multi-thread connection establishment.
- control_fd_update() callback now passes private context
associated with updated file descriptor. File descriptor
can belong to memif socket, memif connection or timerfd.
In case of timerfd the context is NULL.
- memif_create_socket() new API. Creates memif socket
handle to be passed to memif_create() in memif_conn_args_t.
This API allows to pass private context whenever the file
descriptor is updated.
- memif_delete_socket() new API. Deletes memif socket.
Socket must not be in use by any interface.
Type: feature
Change-Id: I7ca4e4349595d4477195f1c32403d3e3a6eb5361
Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
