Fix ssh keyfile permissions on FreeBSD
Fix ssh keyfile permissions on FreeBSD

Signed-off-by: Tino Breddin <8efd86fb78a56a5145ed7739dcb00c78581c5375@tolbrino.com>

voutilad/machine,exoscale/docker-machine,docker/machine,dgageot/machine,voutilad/machine,SvenDowideit/machine,docker/machine,Herbis/machine,larsla/machine,flavio/machine,londoncalling/machine,exoscale/docker-machine,larsla/machine,flavio/machine,dgageot/machine,dweomer/docker-machine,dweomer/docker-machine,ibuildthecloud/machine,ibuildthecloud/machine,Herbis/machine,londoncalling/machine,SvenDowideit/machine