org: greatly reduce the size of satmin.svg

* doc/org/satmin.tex: Use a plain background color instead of some
hashed lines pattern.  This reduces the size of the resulting SVG
file from 1.9MB to 50kB after minification.
* doc/org/satmin.org: Adjust to mention autfilt.
14 jobs for next in 235 minutes and 12 seconds (queued for 6 seconds)
Status Name Job ID Coverage
  Build
passed alpine-gcc #103802

01:44:18

passed arch-clang #103803

01:34:02

passed arch-gcc-glibcxxdebug #103804

02:31:32

passed debian-gcc-snapshot #103801

02:38:59

passed debian-stable-gcc #103799

01:51:35

passed debian-unstable-gcc-coverage #103800

01:50:57

90.6%
passed debpkg-stable #103807

03:22:27

failed debpkg-unstable #103808

03:55:09

passed mingw-shared #103805

00:12:02

passed mingw-static #103806

00:10:25

passed raspbian #103810
armv7

01:33:26

passed rpm-pkg #103809

00:56:45

 
  Publish
skipped publish-rpm #103811
dput
skipped publish-unstable #103812
dput
 
Name Stage Failure
failed
debpkg-unstable Build
-rw-r--r--    1 root     root          6658 Sep 10 23:24 spot_2.9.4.dev.236-1_amd64.changes
-rw-r--r-- 1 root root 849444 Sep 10 23:24 spot_2.9.4.dev.236-1_amd64.deb
-rw-r--r-- 1 root root 4230452 Sep 10 19:55 spot_2.9.4.dev.236.orig.tar.xz
$ exit $exitcode
Uploading artifacts for failed job
Uploading artifacts...
_build_unstable/: found 23 matching files and directories

Uploading artifacts as "archive" to coordinator... ok
id=103808 responseStatus=201 Created token=F8nCn7zu
ERROR: Job failed: exit code 29