SSHFS doesn't honor ForwardX11 settings in ~/.ssh/config

SSHFS doesn't honor ForwardX11 settings in ~/.ssh/config. This is a problem when using ControlMaster. If the initial connection didn't enable X forwarding, no subsequent connections will be able to use it.

If I have the following host configuration.

Host mybox
        Hostname mybox.ahost.com
        User brian
        ForwardX11 yes
        ForwardX11Trusted yes

Host *
        ControlMaster auto
        ControlPath ~/.ssh/socket-%r@%h:%p

And establish my first ssh connection to mybox with

sshfs mybox:/home/brian /media/mybox

This mounts the folder over ssh and creates ~/.<email address hidden>:22

All subsequent ssh connections to mybox will reuse the existing connection. If try to launch an application that requires X

ssh -f mybox mozilla-thunderbird

it will fail, in this case with the error Gtk-WARNING **: cannot open display:

The workaround is to either disable ControlMaster for certain hosts or establish a normal ssh connection before using sshfs.