Try explicit keys, the system agent, and then resolved keys before password
methods. Share discovery, identity selection, certificate/RSA signing and
fatal transport handling between formal and test connections. Keep strict
modes isolated and place draft passwords in the selected authentication plan.
Bound agent discovery, preserve interactive signing time, and drop failed or
cancelled signing transports before they can enter the session pool. Cover
agent-only login, fallback, native pipe deadlines, signing failures, selectors
and independent jump/target identities with isolated protocol and SSH tests.
Addresses #202.
kuddev
28b41acd69