Only send another ZLP if requested or regular uploads are broken
Only send another ZLP if requested or regular uploads are broken

aburgh/libirecovery,wangwei1237/libirecovery,Chronic-Dev/libirecovery,aburgh/libirecovery,xerub/libirecovery,libimobiledevice-win32/libirecovery,libimobiledevice-win32/libirecovery,libimobiledevice/libirecovery,ieswxia/libirecovery,xerub/libirecovery,wangwei1237/libirecovery,Chronic-Dev/libirecovery,libimobiledevice/libirecovery,ieswxia/libirecovery