Support PPD keyword KMDuplex

[jacobmarble]

Jobs via connector always print duplex on some Konica Minolta printers. This might be an easy fix by parsing CUPS sides attribute.

*OpenUI  *KMDuplex/Print Type: PickOne
*OrderDependency: 5 AnySetup *KMDuplex
*DefaultKMDuplex: Double
*KMDuplex Single/1-Sided:  "<< /Duplex false >> setpagedevice
 << /Layout 0 >> /KMOptions /ProcSet findresource /setKMoptions get exec"
*End
*KMDuplex Double/2-Sided:  "<< /Duplex true >> setpagedevice
 << /Layout 0 >> /KMOptions /ProcSet findresource /setKMoptions get exec"
*End
*KMDuplex Booklet/Booklet:  "<< /Duplex true >> setpagedevice
 << /Layout 1 >> /KMOptions /ProcSet findresource /setKMoptions get exec"
*End
*CloseUI: *KMDuplex

[jacobmarble]

This is not fixed. The PPD is parsed correctly, but the ticket is not. I'm yet not sure which is the correct way to fix this.

[jacobmarble]

@charlie2alpha if you have a moment, verify that duplexing is broken on your printer. This patch should fix it.

[charlie2alpha]

Oh, I tried the patch just this morning actually, I did manage to print in both sides of the paper. Last time I tried it, some time last week, that didn't work. Seems to work for me.

[jacobmarble]

Neat-o, thanks!