reuseport: close Listener in case of error (#94)
reuseport: close Listener in case of error (#94)

If closing of an underlying File returns error, a Listener will not
be returned to a user and will not be closed as well.

Signed-off-by: Anton Tiurin <b91bf98aa7cea39040737992640d61c368ae17fe@yandex.ru>
valyala/fasthttp