lpr-commandline setting in gtkprintbackendlpr.c

[Bryan Wright <bryan ayesha phys virginia edu>]

Hi folks,

     I'm trying to track down a problem with gtkprintbackendlpr.c.  Right now,
I'm stuck because I can't figure out where the setting "lpr-commandline",
referred to in that file, is supposed to be read from.  I confess that I don't
know anything about gtk, so apologies in advance if this is a stupid question. 
Thanks in advance for any information.

Bryan