Motivation for this change

Changelog (2019-11-02: Stable release 15492)

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nix-review --run "nix-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)

$ nix path-info -Sh /nix/store/winjkf1598jb8j6qc5wx39hkqy11lhdq-josm-15390
/nix/store/winjkf1598jb8j6qc5wx39hkqy11lhdq-josm-15390	   1.0G
$ nix path-info -Sh /nix/store/ywnk2558hvr27z8p2pf29l6g0gx1yiw9-josm-15492
/nix/store/ywnk2558hvr27z8p2pf29l6g0gx1yiw9-josm-15492	   1.0G

• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

Notify maintainers

cc @rycee