[#261] Disable password auth for SSH.
[#261] Disable password auth for SSH.
[#261] Disable password auth for SSH.
Merge branch 'sshd-disable-password-auth' of github.com:ycombinator/developer.rackspace.com into sshd-disable-password-auth
Merge pull request #266 from ycombinator/sshd-disable-password-auth

[#261] Disable password auth for SSH.