support for ecdsa ssh key.

[lbazan]

• add ssh key support (ecdsa)
• update validator.py
• modify help.py balloon and add warning

Regards!

[laxathom]

Also, note that when you open a pull-request, you can keep update it by pushing new commit to the branch you used. No need to open a pull-request each time you have to edit something. I'll close previous one as duplicate.

[ralphbean]

Last update on this was many months ago. @lbazan, are you still working on this?

[cydrobolt]

@lbazan could you squash some of the Update * commits together?

[ralphbean]

Okay, I'm going to close this since it's stalled out. The branch still exists, so if someone still wants to take it on, please re-open!