Do not exclude erroneous jobs in web interface
Add MQ_DEBUG option to enable verbose output on a live system
Remove chmod permissions hack as no longer in lprng var tree

(we have control of the matterq var tree).
Sanitise slashed on SPOOL_DIR to work with live and testing environment
Fix backend.sh test to work with recent changes in matterq-lprng
Fix mode checking logic in matterq-lprng