Motivation for this change

Recent moc package refactor enabled pretty much all compilation flags by default.
While moc itself works fine, it no longer exits gracefully. With both ffmpeg and curl support compiled in, player segfaults on exit. While this issue is being investigated upstream, I propose to disable curl support by default, since having it is less crucial then graceful closing of player for majority of users.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• 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)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

Notify maintainers

cc @