Thank you for the report.  This is how I understand the part of the spec you quoted: Strictly valid HTTP uses CRLF, but servers and clients should be liberal in what they accept and deal with LF too.  Senthil, do you agree with that?

There are a small number of PyPI-like servers out there which seem to deal fine with what distutils produces.  We have strong backward compatibility constraints in distutils, so we try to make the less changes possible to fix bugs.  Because we’ve haven’t had this reported by those other servers before, I’m tempted to reject this report.  The good part is that since you’re still writing the server, you can change its code to follow Postel’s Law and be liberal in what you accept.  Does that sound acceptable to you?

Best regards