Start sshd for Linux anaconda installer

Add inst.sshd to the kernel args to run the SSH Daemon during the installer. This makes debugging, log collection etc during a linux install much easier.

User is 'root', by default there is no password.

You can then use the sshpw kickstart option to set a password.

Further reading here

https://rhinstaller.github.io/anaconda/boot-options.html