[pdftex] pdftosrc can't extract non-source files

[X]

pdftosrc only extracts embedded files of type source, which seems like an
entirely arbitrary restriction.   This prevented it from extracting the
embedded files

\\rockynhd020\modoutput\stage\sjzxi0hr.qnd\VA_Charlottesville_West_20130611_TM_geo.xml
  \\rockynhd020\modadmin\legend\US Topo Map Symbols.pdf
>From the following US Topo GeoPDF 7.5minute quad file:
   VA_Charlottesville_East_20130611_TM_geo.pdf

which you can obtain like this:
   wget -O gda_5948836.zip
http://ims.er.usgs.gov/gda_services/download?item_id=5948836
#VA_Charlottesville_West_20130611_TM_geo.pdf
   unzip gda_5948836.zip

okular can extract these files, manually, but isn't suitable for batch
operations.

Also, it would be helpful to show an index of the attached files.

pdftosrc version 0.18.2, ubuntu 12.04.2
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