when using xcode 8 doing the push notification setting, unlike xcode 7, xcode 8 need developer turn on push notifications capabilities switch ( located at TARGETS -> AppName -> Capabilities as following pic ), 
then it will generate AppName.entitlements file as following
//AppName.entitlements aps-environmentdevelopment
but for production version App, if we change the string to
//AppName.entitlements aps-environmentproduction
then the Capabilities show a warning
and it seems no matter which string value specified in aps-environment, we can still get the push device token at application:didRegisterForRemoteNotificationsWithDeviceToken:
so what is the correct setting of the push notification entitlements? thank you
I was struggling with that today in Xcode 8 GM. After disabling the setting, deleting my developer portal provisioning profile and regenerating it and enabling the setting again, I was able to eliminate the warning in Xcode. Keep in mind that I didn't fiddle with the entitlements file. I left it at development environment and after archiving I got the correct aps-environment setting (production).
Seems Xcode is stilly very buggy tho even in GM
My problem was my pusher client was out of date and would only push successfully to debug tokens. Other issue which I am still working on a fix for is that I could only export the app via gym with legacy-api enabled, this was not setting the apns-environment to be 'production' and leaving it as 'development' in the 'embedded-mobile.provision' file. I have however been able to successfully deploy the app via the xcode organiser to work with apns(prod) now.
I think the better solution is open the project package and open project.pbxproj
change the CODE_SIGN_ENTITLEMENTS
CODE_SIGN_ENTITLEMENTS = "your-app/production.entitlements";
