#3 ssh-agent support

[David Mankin]

I know that ssh-agent probably isn't in lsh so this
probably won't happen for a while, but here's the
suggestion.

It would be nice to be able to add identites and have
them passed with the ssh connection (like "ssh-agent;
ssh-add; ssh -A" from the command line).

As it is now I have to have MacSSH open a connection,
unlock my keychain, run ssh-agent, run ssh-add, enter
the same password that's stored in the keychain, and
then ssh to anohter machine. (I can't go straight to
the second machine because of firewall settings.)

[David Mankin]

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