ssh_connector_free fails to remove the in/out channel callbacks
as ssh_connector_remove_event sets the in/out channel variables
to NULL.
Have ssh_connector_free, remove the channel callbacks first before
invoking ssh_connector_remove_event.
Signed-off-by: Alberto Aguirre <albaguirre@gmail.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
POLLHUP needs to be checked on in_fd, which may be a pipe.
A pipe in Linux signals EOF through POLLHUP (see:
http://www.greenend.org.uk/rjk/tech/poll.html)
Without checking POLLHUP, a client could spin up indefinetely
doing ssh_event_dopoll.
Signed-off-by: Alberto Aguirre <albaguirre@gmail.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
