Returning CLOSE_WAIT clients in Server::available().  (issue #345).
Returning CLOSE_WAIT clients in Server::available().  (issue #345).

Otherwise, we miss clients that connect, send data, and disconnect before
we get around to calling available().  



Former-commit-id: 76641d1a87116605b219e2778efe868cbc148e61
majenkotech/chipKIT32-MAX,EmbeddedMan/chipKIT32-MAX,chipKIT32/chipKIT32-MAX,chipKIT32/chipKIT32-MAX,adamwolf/chipKIT32-MAX,majenkotech/chipKIT32-MAX,majenkotech/chipKIT32-MAX,tintin304/chipKIT32-MAX,ricklon/chipKIT32-MAX,EmbeddedMan/chipKIT32-MAX,EmbeddedMan/chipKIT32-MAX,adamwolf/chipKIT32-MAX,ricklon/chipKIT32-MAX,adamwolf/chipKIT32-MAX,EmbeddedMan/chipKIT32-MAX,chipKIT32/chipKIT32-MAX,tintin304/chipKIT32-MAX,adamwolf/chipKIT32-MAX,majenkotech/chipKIT32-MAX,majenkotech/chipKIT32-MAX,ricklon/chipKIT32-MAX,tintin304/chipKIT32-MAX,adamwolf/chipKIT32-MAX,EmbeddedMan/chipKIT32-MAX,chipKIT32/chipKIT32-MAX,tintin304/chipKIT32-MAX,adamwolf/chipKIT32-MAX,chipKIT32/chipKIT32-MAX,ricklon/chipKIT32-MAX,tintin304/chipKIT32-MAX,tintin304/chipKIT32-MAX,adamwolf/chipKIT32-MAX,majenkotech/chipKIT32-MAX,majenkotech/chipKIT32-MAX,EmbeddedMan/chipKIT32-MAX,chipKIT32/chipKIT32-MAX,ricklon/chipKIT32-MAX,chipKIT32/chipKIT32-MAX,ricklon/chipKIT32-MAX,EmbeddedMan/chipKIT32-MAX,tintin304/chipKIT32-MAX,ricklon/chipKIT32-MAX