Fixed all volume group run

Howdy,

Fixed the handling for "all" volume groups.
Added in handling for UNKNOWN status and exiting with a fair error message in that case.


Later.
Finally got it :) Its apparently too late for me.
I've added some quotes that should solved the problem. 

Thanks for bug fixing. 
Please let me know if you want to enhance/redesign this old code ;) I am glad someone finds it useful

J.