Use NSURLSession instead of AFNetworking
Use NSURLSession instead of AFNetworking

Rewrite http_client on macOS to use modern NSURLSession API instead of
relying on AFNetworking. This was long overdue and among other
improvements brings HTTP/2 support.

alexhenrie/poedit,alexhenrie/poedit,nawawi/poedit,nawawi/poedit,vslavik/poedit,nawawi/poedit,nawawi/poedit,vslavik/poedit,PKRoma/poedit,nawawi/poedit,PKRoma/poedit,PKRoma/poedit,alexhenrie/poedit,PKRoma/poedit,vslavik/poedit,alexhenrie/poedit,alexhenrie/poedit,PKRoma/poedit,vslavik/poedit,vslavik/poedit