* Do not allow duplicate entries by default in add_text_to_file()
* Add option which allows duplicates

Submitted-by: Uranellus via IRC
* Do not allow duplicate entries by default in add_text_to_file()
* Add option which allows duplicates

Submitted-by: Uranellus via IRC

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