Print to an IPP printer (pkipplib?)

[Adam Tauno Williams]

I've found the module pkipplib which seems to work well for things like
interrogating an IPP (CUPS) server.  But is there a way to send a print
job to an IPP print queue? [and no, the local system knows nothing about
the print architecture so popen....lp is not an option].  I just want to
send the data from a file handle to a remote IPP queue as a print job.