[Printing-architecture] better support for 203dpi label printer

[YaoCL]

> 在 2016年8月13日，上午1:13，James Cloos <cloos at jhcloos.com> 写道：
> 
> Adding 0 .setfilladjust to a postscript job should be done just like how
> the ps2ps filter adds snippets from ppd files.
> 
> For rendering pdf w/ gs, I'd expect:
> 
>    -c '0 .setfilladjust'
> 
> is required.  Yes?

Yes, append this to gs command line is required. I tested with this method.
I created a pdf with 0.125mm width parallel lines, render in 203.2 dpi, with `-c ‘0 .setfilladjust’`
It generate perfect result. 0.125mm is dot size in 203.2 dpi. 

—
YaoCL