Use SSH agent for authentication

[cschorn]

This makes it possible to use agent authentication for hosts by specifying an agent key in the authentication section:

'auth' => array(
    'username' => 'shunt',
    'agent' => true,
)

A username must be provided and the key must be registered with the SSH agent.

[cschorn]

I have no idea why this timed out ... it works well on my test server (Debian 7 w. the dotdeb packages).
Is there a way to retry the build or do I have to make a bogus commit?

[toopay]

@cschorn unlike jenkins, i believe there is no rebuild button there. Bogus commit is fine, i'll merge this once it getting passed. Otherwise, i'll need to investigate why it break, the patch seems harmless.

[acrobat]

@toopay maybe this is helpfull http://stackoverflow.com/a/17624403/1322550 ;) ("you need to have write access to the github repo")