Make default proxy smarter
Make default proxy smarter

With this change, the question mark is only added when it is not already
present in the proxy string.

esraerik/cesium,likangning93/cesium,CesiumGS/cesium,hodbauer/cesium,kiselev-dv/cesium,hodbauer/cesium,AnimatedRNG/cesium,AnalyticalGraphicsInc/cesium,CesiumGS/cesium,aelatgt/cesium,wallw-bits/cesium,wallw-bits/cesium,aelatgt/cesium,jasonbeverage/cesium,YonatanKra/cesium,emackey/cesium,kiselev-dv/cesium,YonatanKra/cesium,hodbauer/cesium,denverpierce/cesium,denverpierce/cesium,kiselev-dv/cesium,kaktus40/cesium,jason-crow/cesium,progsung/cesium,jason-crow/cesium,oterral/cesium,wallw-bits/cesium,oterral/cesium,emackey/cesium,NaderCHASER/cesium,ggetz/cesium,kiselev-dv/cesium,esraerik/cesium,esraerik/cesium,NaderCHASER/cesium,omh1280/cesium,denverpierce/cesium,soceur/cesium,omh1280/cesium,josh-bernstein/cesium,likangning93/cesium,aelatgt/cesium,YonatanKra/cesium,AnalyticalGraphicsInc/cesium,ggetz/cesium,CesiumGS/cesium,likangning93/cesium,aelatgt/cesium,kaktus40/cesium,jason-crow/cesium,AnimatedRNG/cesium,CesiumGS/cesium,NaderCHASER/cesium,ggetz/cesium,geoscan/cesium,jason-crow/cesium,denverpierce/cesium,progsung/cesium,YonatanKra/cesium,oterral/cesium,ggetz/cesium,CesiumGS/cesium,emackey/cesium,josh-bernstein/cesium,soceur/cesium,likangning93/cesium,esraerik/cesium,soceur/cesium,likangning93/cesium,geoscan/cesium,AnimatedRNG/cesium,jasonbeverage/cesium,omh1280/cesium,emackey/cesium,AnimatedRNG/cesium,wallw-bits/cesium,omh1280/cesium