Update help URLs for base system files, remove old/obsolete files.
Update help URLs for base system files, remove old/obsolete files.

NewEraCracker/pfsense,ptorsten/pfsense,NOYB/pfsense,dennypage/pfsense,pfsense/pfsense,pfsense/pfsense,NewEraCracker/pfsense,NewEraCracker/pfsense,ptorsten/pfsense,pfsense/pfsense,phil-davis/pfsense,dennypage/pfsense,NewEraCracker/pfsense,NOYB/pfsense,ptorsten/pfsense,NOYB/pfsense,phil-davis/pfsense,phil-davis/pfsense,jxmx/pfsense,jxmx/pfsense,phil-davis/pfsense,jxmx/pfsense,dennypage/pfsense,pfsense/pfsense,dennypage/pfsense