As we now support alternate version checking URLs, replace the current error message upon check_firmware_version() with something more general.
As we now support alternate version checking URLs, replace the current error message upon check_firmware_version() with something more general.

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