Last version from author was 3.8.35 done at end of 2010. Appears that many useful features are present, many other problems like Kerberos need removal. Author said that IPP would start at 4.x.x versions, which have never been done. Is using Artistic license.
Has SSL support, which would need to be updated, by someone else. I'm a USA citizen. Documentation is moderately OK, but poorly organized and has a lot of sections which show some examples: "I haven't used but you can see what you get out of it." Fixing all the problems and then trying to get IPP support going might be a good answer to lpd problems. Chris Bennett