On the OpenSSH timing attack, add a peer method, elaborate desc and prints

I would love to see this in the release cut but won't die if I don't. There are some code changes in this PR that aren't just descriptions.

## Verification

  - [x] Run the module per usual.
  - [x] Read the new description and understand more of the attack
  - [x] See the extra non-CVE references.
  - [x] See the print_* lines indicate which host and port we're talking to in an easy-to-read way.

I'd love to know a little more as to why this happens, it seems mysterious. However, the first machine I tested it on (live and in production) has the problem, so the lack of a fix may be worth mentioning in the description as well.