code.gitea.io/gitea@v1.21.7/options/license/Xfig (about)

     1  Any party obtaining a copy of these files is granted, free of charge, 
     2  a full and unrestricted irrevocable, world-wide, paid up, royalty-free, 
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     4  files (the "Software"), including without limitation the rights to use, 
     5  copy, modify, merge, publish and/or distribute copies of the Software, 
     6  and to permit persons who receive copies from any such party to do so, 
     7  with the only requirement being that this copyright notice remain intact.