Ssh with multiple github accounts

• https://superuser.com/questions/357602/use-a-specified-key-from-ssh-agent

• https://unix.stackexchange.com/questions/454728/can-an-ssh-config-host-have-multiple-hostname-entries

• https://github.com/dbrady/ssh-config

• https://superuser.com/questions/732231/how-can-i-apply-some-settings-to-a-ssh-hosts-excluding-one-other-host

( * https://newbedev.com/ssh-config-wildcard-on-expanded-hostname )

• https://gist.github.com/vanpeerdevelopment/8673769