DPUSER is distributed under the GNU Public License, which requires the
availability of all dependent software packages under this license. Since
PGPLOT is non-free software, the Debian version of DPUSER and QFitsView is
linked to the giza library instead. Therefore, a number of procedures are not
available that use low-level graphics of PGPLOT via PGXTAL: 

colint,  colsrf, coltab, sb2srf, sbbal, sbcone, sbcpln, sbelip, sbfbkg,
sbfcls, sbfint, sbfsav, sbline, sbplan, sbplnt, sbrod, sbslic, sbsurf, sbtbal,
sbtext, sbtsur, shade

Also the routines based on FREDDY are not available since freddy.f is not
freely distributable:

freddy, surface.

 -- Ole Streicher <olebole@debian.org>  Mon, 04 Jul 2016 12:58:07 +0200
