Don't ignore global ssh_config by default.
Don't ignore global ssh_config by default.

Specifying a config file to ssh makes it impossible to also read the global
config. Which is daft, but that's what ssh does. So I've removed ~/.ssh as
a place to look for configs, on the principle that not specifying any
config will read both the global ssh_config and ~/.ssh/config, and that's
the expected default behaviour.

Any identity specific config will still ignore the global config, but that
seems fine to me.

ccontavalli/ssh-ident