vagrant private key permissions

[johnbender]

SSH fails when the default key in the gem isn't set to read write and execute by the owner.

[mitchellh]

Clarifications on this bug I found while debugging it: This error only occurs when the user running vagrant ssh is the same owner as the private key file, and the private key file is not chmodded to 0600.

Therefore, this probably only affects a small number of Vagrant users at the moment, luckily. (Specifically those who installed via RVM or something similar)

That being said, it should be fixed in this changeset: http://github.com/mitchellh/vagrant/commit/b80a08ce8ef5c835c883f9956cb679e583fd4248

I'm going to continue doing some basic testing for a bit, then I'll push this fix out as part of a 0.2.1 most likely.

Mitchell