Fix snapshots not saving /var

The problem was reported by Caramel, discussed here:

https://forum.puppylinux.com/viewtopic.php?t=13700

Some parts of /var are not to be snap-shotted, some are. Github fix:

https://github.com/bkauler/woofq/commit/fe9eee658069a0c18bd15ee2b777ce8f94bda1dd

...hmm, I'm assuming mksquashfs will accept paths in the exclude file.  

Tags: easy