Bump SSHD version to 0.9.0.201311081

With new Mina project release two backends are supported Mina & NIO2. Expose
new NIO2 backend through new configuration option while preserving the Mina
backend to be default.

Remove the fake to turn off closing idle connections by using the highest
timeout allowed by Apache SSD (~24 days).  That special treatment is not
needed any more.

Restrict `sshd.tcpKeepAlive` configuration option to be used only for Mina
backend.

Remove `sshd.reuseAddress` (it is per default true) as there is no obvious
way how to set it.

SSHD 0.9.0 incorrectly sends "Authenticated with..." message:

  davido@wizball:>ssh gerrit cookbook say-hello Dude
  Authenticated with partial success.
  Hello Dude!

That bug is tracked under [1].  With that patch applied the problem with
"Authenticated with partial success." is solved. Gerrit's Maven repository
contains 0.9.0.201311081 which is 0.9.0 with [2] cherry-picked on top.

[1] https://issues.apache.org/jira/browse/SSHD-254
[2] https://github.com/apache/mina-sshd/pull/2

Bug: issue 2003
Change-Id: Ic352d7e6a9e6f8ab4122b2667ead24ac3d73f68a
8 files changed