Critical bug fixed in mindi

Ok, I've reproduced (I wish I had not) the bug in mindi which removes all mondo images on an NFS share. 2.2.7 will contain more checks again around rm -rf of tmpdir, but to avoid further issues, mindi now mounts the NFS share read-only at restore time, which closes the bug.

I'm rebuilding a mindi 2.0.3 package that I should announce tomorrow, nefor leaving for one week of vacation (Early Music and 3 concerts yeah ! Cf: ​http://exultate.hautetfort.com/) If you're near Paris at that time, come and say hello !