The cups backend doesnt retrieve the cups servername during runtime. instead
"localhost" is hardcoded. Here is a "fix" that solves the problem (line 78 in
cups.c):
      const char * server = cupsServer();
      sprintf (buf, "ipp://%s:631/printers/%s", server, dests[i].name);
      ippAddString (request, IPP_TAG_OPERATION, IPP_TAG_URI, "printer-uri",
NULL, buf);
      request->request.op.operation_id = IPP_GET_PRINTER_ATTRIBUTES;

      HTTP = httpConnect (server, 631);

Reproducible: Always
Steps to Reproduce:
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