Update of gimp-netpbm2gimp-plugins to Netpbm 10.91.01

Netpbm2Gimp's gimp-netpbm2gimp-plugins subpackage, which provides hundreds of pre-built Gimp plug-ins created using Netpbm2Gimp, has been updated to correspond to version 10.91.01 (21-Jul-2020) of Netpbm. This update include three Netpbm utilities that were previously inadvertently omitted and includes a large number of upstream bug fixes and improvements made since the previous release of gimp-netpbm2gimp-plugins. Netpbm2Gimp itself remains at version v1.11.

Netpbm2Gimp is available for download from http://sourceforge.net/projects/netpbm2gimp/files/, or follow the links from the Netpbm2Gimp home page, http://netpbm2gimp.sourceforge.net/. Some other relevant links are the home pages for the Netpbm toolkit (http://netpbm.sourceforge.net/) and the Gimp drawing program (http://www.gimp.org/).