Do not allow certificate to be deleted if it's been used by a package. Fixes #4142
Do not allow certificate to be deleted if it's been used by a package. Fixes #4142

phil-davis/pfsense,dennypage/pfsense,brunostein/pfsense,NOYB/pfsense,NewEraCracker/pfsense,pfsense/pfsense,phil-davis/pfsense,NOYB/pfsense,pfsense/pfsense,NewEraCracker/pfsense,pfsense/pfsense,jxmx/pfsense,jxmx/pfsense,BlackstarGroup/pfsense,dennypage/pfsense,dennypage/pfsense,pfsense/pfsense,ch1c4um/pfsense,jxmx/pfsense,BlackstarGroup/pfsense,ptorsten/pfsense,ch1c4um/pfsense,brunostein/pfsense,phil-davis/pfsense,NOYB/pfsense,ch1c4um/pfsense,phil-davis/pfsense,dennypage/pfsense,NewEraCracker/pfsense,BlackstarGroup/pfsense,BlackstarGroup/pfsense,ch1c4um/pfsense,ptorsten/pfsense,NewEraCracker/pfsense,ptorsten/pfsense,brunostein/pfsense