exp/ssh: handle versions with just '\n'

djm recommend that we do this because OpenSSL was only fixed in 2008:
http://anoncvs.mindrot.org/index.cgi/openssh/sshd.c?revision=1.380&view=markup

R=dave, jonathan.mark.pittman
CC=golang-dev
https://golang.org/cl/5555044
2 files changed