Add refcount_read to util.inc
Add refcount_read to util.inc

Add refcount_read so other code can easily find out how many things have the file system mounted.
brunostein/pfsense,jxmx/pfsense,jxmx/pfsense,dennypage/pfsense,phil-davis/pfsense,NewEraCracker/pfsense,BlackstarGroup/pfsense,NewEraCracker/pfsense,BlackstarGroup/pfsense,jxmx/pfsense,phil-davis/pfsense,ptorsten/pfsense,dennypage/pfsense,brunostein/pfsense,dennypage/pfsense,NewEraCracker/pfsense,ptorsten/pfsense,phil-davis/pfsense,pfsense/pfsense,NewEraCracker/pfsense,pfsense/pfsense,NOYB/pfsense,dennypage/pfsense,BlackstarGroup/pfsense,ch1c4um/pfsense,NOYB/pfsense,pfsense/pfsense,ch1c4um/pfsense,ch1c4um/pfsense,NOYB/pfsense,BlackstarGroup/pfsense,pfsense/pfsense,phil-davis/pfsense,ch1c4um/pfsense,brunostein/pfsense,ptorsten/pfsense