Provide serial port access to a VM
I made a mistake in my CentOS Linux image so when it booted, it could not fully boot. However, I could see in the Linux Boot Diagnostics page that the kernel was asking me for the root password so I could fix the problem. It wasn't booted, so there was not network yet. However, it could talk on a serial port to let me login - if you could add that to AzureStack.