Instead of searching `/usr` it should search for the `xkb`,
$XDG_DATA_DIRS will be searched. With this approach we allow compliance
on NixOS and non-NixOS systems to find `symbols` in the `xkb` directory.

The patch has been accepted by upstream, but isn't released yet, so this
is mainly a temporary fix until we can bump ZSH to the next stable version.

The `xserver` module links `/share/X11/xkb` to `/run/current-system` to
make this possible.

The fix can be tested inside the following VM:

```
{
  zshtest = {
    programs.zsh.enable = true;
    users.extraUsers.vm = {
      password = "vm";
      isNormalUser = true;
    };
    services.xserver.enable = true;
  };
}
```

Fixes #46025

I'm not sure what the problem is, precisely, but even so
this was preventing use of things like cast'ing--
not that I'm entirely clear on what that would be the case either :/.

Err on caution and let's go back to what the situation was before
and fix it properly when we better understand the issue.

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/openimageio/versions

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/jetty/versions

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/gtkwave/versions

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/dune/versions

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/awf/versions

We might need OCaml packages that are not the one Coq is depending on
but they still need to come from the same package set (same OCaml version).

This breaks with networking backends enabled and
also creates large delays on boot when some services depends
on the network target. It is also not really required
because tinc does create those interfaces itself.

fixes #27070

https://github.com/ericniebler/range-v3/releases/tag/0.4.0

haskellPackages.cabal-macosx: Tests don't build with Cabal >= 2.2

…chrome

google-chrome: use default patchelf, "fixes" nacl_helper crashing.

range-v3: 0.3.7 -> 0.4.0

nixos/tinc: remove unnecessary networking.interfaces

vscode: 1.28.0 -> 1.28.2

btrbk: 0.26.1 -> 0.27.0

nixos/zfs: Hide useless errors when waiting for zpool to be ready

jetty: 9.4.8.v20171121 -> 9.4.12.v20180830

dune: 1.3.0 -> 1.4.0

awf: 1.3.1 -> 1.4.0

…etc.

gtkwave: 3.3.94 -> 3.3.95

…package

coq: add ocamlPackages in passthru

global-platform-pro: 0.3.10-rc11 -> 18.09.14

parity: 1.11.10 -> 2.0.8; parity-beta: 2.0.3 -> 2.1.3

kvmgt module: add restart on failure

openimageio: 1.8.14 -> 1.8.15

mixxx: added opus files support

zsh: patch `_setxkbmap` completion script

This update was generated by hackage2nix v2.11.1-1-g9fae38b from Hackage revision
commercialhaskell/all-cabal-hashes@a013b65.

MarcWeber/hasktags#52 has been closed and a new version (0.71.1) has been released.