Added some web.config comments to clarify things
Added some web.config comments to clarify things

projectkudu/SiteExtensionGallery,grenade/NuGetGallery_download-count-patch,skbkontur/NuGetGallery,ScottShingler/NuGetGallery,mtian/SiteExtensionGallery,ScottShingler/NuGetGallery,ScottShingler/NuGetGallery,projectkudu/SiteExtensionGallery,skbkontur/NuGetGallery,grenade/NuGetGallery_download-count-patch,JetBrains/ReSharperGallery,JetBrains/ReSharperGallery,mtian/SiteExtensionGallery,skbkontur/NuGetGallery,grenade/NuGetGallery_download-count-patch,JetBrains/ReSharperGallery,projectkudu/SiteExtensionGallery,mtian/SiteExtensionGallery