Remove redundant input validation for source port that also prevents use of port ranges.
Remove redundant input validation for source port that also prevents use of port ranges.

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