You can patch it with:
# echo 'UseRoaming no' >> /etc/ssh/ssh_config
or $ echo "UseRoaming no" >> ~/.ssh/config # echo 'UseRoaming no' >> /etc/ssh/ssh_config
or $ echo "UseRoaming no" >> ~/.ssh/configFWIW I am on 10.10.5 not 10.11. Maybe there's a change in 10.11. (The article the grandparent links is focused on 10.10 so I assumed that was in the scope of this discussion.)
PS are you on homebrew? maybe homebrew adds it.