List hosts from the SSH client config file

[kristaps]

It would be very convenient if the tool allowed to use the hosts from an existing ~/.ssh/config without having to create a separate config file.

[mmeyer724]

I like this idea, I previously was not aware of .ssh/config's ability to alias hosts. Should be rather easy to parse.

[phiberr]

An example that parses the .ssh/config to create a menu. https://github.com/antonjah/ssh-menu