Rework of filefield_private to rework how the file is handled.
#705766: File names are gone when a subdir is setted in Filepath settings by dagmar: Files are renamed when a custom path is defined in filefield settings
This is the initial alpha release - please test and supply feedback!
Includes fixes for a number of bugs found in the discussion True public / private download option for filefield and adds the option for both inline / attachment download options.