Allow only displaying hostname if connected via SSH

[pdf]

Adds an option only_if_ssh to the host function to allow hiding hostname on the local host

[edkolev]

Nice! Thank you!

I'll test this out over the weekend.

In the meantime, could you:

• squash the commits
• add your name here https://github.com/edkolev/promptline.vim/blob/master/CONTRIBUTORS.md

[pdf]

Done :sunglasses: