Catch the exception thrown when ssh can't connect.
Catch the exception thrown when ssh can't connect.

Easiest test: give it an invalid hostname.

Reported by Chetan Kunte.

CasparLi/sshuttle,cgundogan/sshuttle,loadlj/sshuttle,zabracks/sshuttle,sshuttle/sshuttle,v2e4lisp/sshuttle,shaunstanislaus/sshuttle,dxq-git/sshuttle,mralexgray/sshuttle,mheiges/sshuttle,bitmonk/sshuttle,cgundogan/sshuttle,brianmay/sshuttle,GrimDerp/sshuttle,dushmis/sshuttle,dxq-git/sshuttle,guiquanz/sshuttle,xtaran/sshuttle,ru-faraon/sshuttle,vStone/sshuttle,dxq-git/sshuttle,loadlj/sshuttle,fastly/sshuttle,michaelcontento/sshuttle,ru-faraon/sshuttle,luthfihm/sshuttle,dushmis/sshuttle,vStone/sshuttle,brianmay/sshuttle,fastly/sshuttle,dushmis/sshuttle,xtaran/sshuttle,shaunstanislaus/sshuttle,sekka1/sshuttle,bitmonk/sshuttle,loadlj/sshuttle,luthfihm/sshuttle,apenwarr/sshuttle,ru-faraon/sshuttle,CasparLi/sshuttle,mheiges/sshuttle,sshuttle/sshuttle,shaunstanislaus/sshuttle,mralexgray/sshuttle,GrimDerp/sshuttle,zabracks/sshuttle,xtaran/sshuttle,zabracks/sshuttle,apenwarr/sshuttle,bitmonk/sshuttle,guiquanz/sshuttle,guiquanz/sshuttle,mheiges/sshuttle,brianmay/sshuttle,vStone/sshuttle,brianmay/sshuttle,luthfihm/sshuttle,cgundogan/sshuttle,v2e4lisp/sshuttle,fastly/sshuttle,mralexgray/sshuttle,sekka1/sshuttle,CasparLi/sshuttle,michaelcontento/sshuttle,v2e4lisp/sshuttle,GrimDerp/sshuttle,michaelcontento/sshuttle,sekka1/sshuttle