Ugly hack for sharing Xauthority, lost the better way to do this...

xauth-multiuser-sudo-hack

The user `primary` is the user with the desktop access
The user `secondary` is a user you sudo/su to who you would like to run X11 apps
`x11-share` is a group that you create. All users who should share the xauth cookies should be in this group
**Note this is a security issue if you do not trust the `x11-share` users!!**

/etc/sudoers:
```
Defaults:deploy env_keep += "XAUTHORITY", !requiretty
Defaults:deploy env_keep += "DISPLAY", !requiretty
```

~primary/.bashrc
```
export XAUTHDIR=/tmp
export XAUTHDST=$XAUTHDIR/.Xauthority-shared
cp $XAUTHORITY $XAUTHDST
export XAUTHORITY=$XAUTHDST
sudo chown a.x11-share $XAUTHORITY 2>&1 >/dev/null
sudo chmod 660 $XAUTHORITY 2>&1 >/dev/null
```
~secondary/.bashrc
```
if [ -f $XAUTHORITY ]; then
  xauth add `cat /tmp/a`
fi
```

Now, sudo or su to the user `secondary` and you should still have display access via the cookies in xauth.

Yes, you can do this with xauth +localhost. I'm more interested in doing this more elegantly than I am with that simple solution

For those of you who are silly, dumb or not thinking, make sure you source the primary user's ~/.bashrc first before trying this the first time...