Comment out (potentially) insecure ciphers arcfour and none.
Merge pull request #406 from bantu/remove-ssh-arcfour

Remove the arcfour and none ciphers from SSH2.

* bantu/remove-ssh-arcfour:
  Comment out (potentially) insecure ciphers arcfour and none.
Merge branch 'master' into php5

* master:
  Comment out (potentially) insecure ciphers arcfour and none.