further improvement of maintenance scripts

entries/3dc.md

@@ -2,7 +2,7 @@
 
 - Home: https://packages.debian.org/sid/3dchess, http://www.ibiblio.org/pub/Linux/games/strategy/3Dc-0.8.1.tar.gz
 - State: mature, inactive since 2000
-- Keywords: board, puzzle, chess, open content
+- Keywords: board, puzzle, chess, open content, 3D
 - Code repository: @see-home
 - Code language: C
 - Code license: GPL-2.0
@@ -10,6 +10,4 @@
 - Assets license: GPL-2.0
 - Developer: Paul Hicks, Bernard Kennedy
 
-Chess game on 3 boards.
-
 ## Building