Do not allow user to select "network" and enter an alias.  Alert user the item is an alias and that is should be set to "Single host or alias" option before saving.
Do not allow user to select "network" and enter an alias.  Alert user the item is an alias and that is should be set to "Single host or alias" option before saving.

Ticket #1090

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