Fixes #1874. Correctly error out when the user or the pass is not posted during login of CP.
Fixes #1874. Correctly error out when the user or the pass is not posted during login of CP.

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