Fix the proxy-disable to work on Python 2/3
Fix the proxy-disable to work on Python 2/3

AustereCuriosity/astropy,saimn/astropy,AustereCuriosity/astropy,stargaser/astropy,joergdietrich/astropy,kelle/astropy,AustereCuriosity/astropy,MSeifert04/astropy,dhomeier/astropy,joergdietrich/astropy,StuartLittlefair/astropy,bsipocz/astropy,AustereCuriosity/astropy,mhvk/astropy,pllim/astropy,dhomeier/astropy,StuartLittlefair/astropy,lpsinger/astropy,dhomeier/astropy,aleksandr-bakanov/astropy,bsipocz/astropy,astropy/astropy,lpsinger/astropy,StuartLittlefair/astropy,astropy/astropy,mhvk/astropy,dhomeier/astropy,kelle/astropy,larrybradley/astropy,funbaker/astropy,funbaker/astropy,tbabej/astropy,saimn/astropy,saimn/astropy,funbaker/astropy,tbabej/astropy,kelle/astropy,larrybradley/astropy,astropy/astropy,lpsinger/astropy,astropy/astropy,MSeifert04/astropy,AustereCuriosity/astropy,stargaser/astropy,joergdietrich/astropy,DougBurke/astropy,larrybradley/astropy,saimn/astropy,lpsinger/astropy,tbabej/astropy,stargaser/astropy,StuartLittlefair/astropy,joergdietrich/astropy,stargaser/astropy,lpsinger/astropy,bsipocz/astropy,aleksandr-bakanov/astropy,bsipocz/astropy,saimn/astropy,larrybradley/astropy,DougBurke/astropy,pllim/astropy,MSeifert04/astropy,pllim/astropy,DougBurke/astropy,aleksandr-bakanov/astropy,mhvk/astropy,DougBurke/astropy,dhomeier/astropy,mhvk/astropy,kelle/astropy,kelle/astropy,pllim/astropy,tbabej/astropy,larrybradley/astropy,joergdietrich/astropy,tbabej/astropy,MSeifert04/astropy,astropy/astropy,mhvk/astropy,pllim/astropy,StuartLittlefair/astropy,funbaker/astropy,aleksandr-bakanov/astropy