I port the patch for esperanto symbols removed in 1be2acd1317aadc8e1a08d17312e524fb5fc2a4300 to the current xkeyboardconfig. (cherry picked from commit 4a830de0323e34592a36dea660d9a3ec8348964e)
Also drop Esperanto patch for now, as it doesn't apply anymore and there are some Esperanto variants inside. Discussed: https://github.com/NixOS/nixpkgs/commit/fa5a583098