Fix #5831
Fix #5831

After PKG_AUTOUPDATE=false was removed, operations done during boot,
2nd and 3rd stages of upgrade process, are trying to update repository
metadata. The problem is during this stage we don't have a network
available yet and all needed packages were previously downloaded.

Add -U parameter to all read/write pkg calls during at these stages to
prevent pkg(8) to try to update metadata

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