Update user agents support for headers as lists (fixes GH-1922)
Update user agents support for headers as lists (fixes GH-1922)

looker/sentry,mvaled/sentry,JackDanger/sentry,jean/sentry,korealerts1/sentry,imankulov/sentry,looker/sentry,beeftornado/sentry,mvaled/sentry,felixbuenemann/sentry,mvaled/sentry,mitsuhiko/sentry,BuildingLink/sentry,BuildingLink/sentry,BuildingLink/sentry,mitsuhiko/sentry,daevaorn/sentry,BuildingLink/sentry,Natim/sentry,beeftornado/sentry,gencer/sentry,Kryz/sentry,gencer/sentry,jean/sentry,looker/sentry,zenefits/sentry,daevaorn/sentry,kevinlondon/sentry,zenefits/sentry,BayanGroup/sentry,mvaled/sentry,JackDanger/sentry,ifduyue/sentry,fotinakis/sentry,kevinlondon/sentry,JamesMura/sentry,ngonzalvez/sentry,zenefits/sentry,JackDanger/sentry,fotinakis/sentry,Natim/sentry,JamesMura/sentry,gencer/sentry,nicholasserra/sentry,BuildingLink/sentry,JamesMura/sentry,JamesMura/sentry,jean/sentry,mvaled/sentry,felixbuenemann/sentry,nicholasserra/sentry,zenefits/sentry,gencer/sentry,alexm92/sentry,alexm92/sentry,Natim/sentry,nicholasserra/sentry,korealerts1/sentry,ngonzalvez/sentry,zenefits/sentry,Kryz/sentry,fotinakis/sentry,looker/sentry,Kryz/sentry,ifduyue/sentry,jean/sentry,JamesMura/sentry,BayanGroup/sentry,imankulov/sentry,daevaorn/sentry,jean/sentry,mvaled/sentry,ifduyue/sentry,ifduyue/sentry,imankulov/sentry,beeftornado/sentry,fotinakis/sentry,daevaorn/sentry,looker/sentry,felixbuenemann/sentry,korealerts1/sentry,gencer/sentry,alexm92/sentry,kevinlondon/sentry,ifduyue/sentry,BayanGroup/sentry,ngonzalvez/sentry