[Samba] Printer requires bidirectional support

[Joe Konecny]

I have a Zebra 2844 label printer.  I set it up the way I
normally do for all printers with printcap.

p54|Zebra LP2844 - Shipping Labels:\
	:sh:\
	:rm=10.0.0.31:\
	:sd=/var/spool/output/lpd/p54:\
	:rp=portlf1:


This wouldn't work however.  So I tried to print directly
to the ip address.  That works fine but only if you have
bidirectional enabled in the windows print driver.  I'm not
sure what to do since once windows has handed the job off
to samba and it's sitting in the queue there's nothing
more to do.  Can't lpd somehow provide the "bidirectional"
support to this printer?