Add an auto-update script for atanks

+5
+5
pkgs/games/atanks/default.upstream
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··· 1 + url http://sourceforge.net/projects/atanks/files/atanks/ 2 + version_link 'atanks[-][0-9.]+/$' 3 + version_link '[.]tar[.][a-z0-9]+/download' 4 + SF_redirect 5 + do_overwrite () { do_overwrite_just_version; }