When the znapzend module was enabled for the first time with pure =
true; then the list of previous entries is empty, but xargs still tried
to execute a znapzendzetup delete command with no arguments, which made
it fail

The configure script uses the `command` builtin command which is bash
specific while having a "#!/bin/sh" head.

This forces the use nix default shell (bash)

(cherry picked from commit 159a021)

…ng to reference DTD from network and failing.

… from attempting to reference DTD from network and failing.

Semi-automatic update generated by https://github.com/ryantm/nix-update tools. These checks were done:

- built on NixOS
- ran `/nix/store/dykj39kcyb4rj6pm347q0djry1q5gh2y-mediainfo-18.03/bin/mediainfo -h` got 0 exit code
- ran `/nix/store/dykj39kcyb4rj6pm347q0djry1q5gh2y-mediainfo-18.03/bin/mediainfo --help` got 0 exit code
- directory tree listing: https://gist.github.com/f5a53e7a582604e5913226a02b977dc6

Semi-automatic update generated by https://github.com/ryantm/nix-update tools. These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 3.14.2 with grep in /nix/store/anzim7y47xa3m530qzq91n9wl8ys1kk2-Mopidy-Iris-3.14.2
- directory tree listing: https://gist.github.com/96a0fc1d9812e5c4e6659fd37c7b21c6

Semi-automatic update generated by https://github.com/ryantm/nix-update tools. These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 5.4 with grep in /nix/store/p24xccx2wm6dls7g36pzdl1m1r3p1x5l-rawtherapee-5.4
- directory tree listing: https://gist.github.com/ea61efad6dd7afad2c60614dd433534d

Semi-automatic update generated by https://github.com/ryantm/nix-update tools.

This update was made based on information from https://repology.org/metapackage/snd/versions.

These checks were done:

- built on NixOS
- ran `/nix/store/caxkfgbcv6kplihpx8gbivz6l5sisnv5-snd-18.2/bin/snd --help` got 0 exit code
- ran `/nix/store/caxkfgbcv6kplihpx8gbivz6l5sisnv5-snd-18.2/bin/snd --version` and found version 18.2
- ran `/nix/store/caxkfgbcv6kplihpx8gbivz6l5sisnv5-snd-18.2/bin/snd --help` and found version 18.2
- found 18.2 with grep in /nix/store/caxkfgbcv6kplihpx8gbivz6l5sisnv5-snd-18.2
- directory tree listing: https://gist.github.com/549e1eef8a929e09d72499dc97a47aa2

Semi-automatic update generated by https://github.com/ryantm/nix-update tools.

This update was made based on information from https://repology.org/metapackage/swiften/versions.

These checks were done:

- built on NixOS
- ran `/nix/store/pfiq18ki0dzdd0zsbvv04sppr4f28fl5-swiften-4.0/bin/swiften-config -h` got 0 exit code
- ran `/nix/store/pfiq18ki0dzdd0zsbvv04sppr4f28fl5-swiften-4.0/bin/swiften-config --help` got 0 exit code
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- ran `/nix/store/pfiq18ki0dzdd0zsbvv04sppr4f28fl5-swiften-4.0/bin/swiften-config --version` and found version 4.0
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upstream changed it

json 1.8.3 is broken with ruby 2.4

/cc ZHF NixOS#36454

I’d like to be notified of changes so I can ensure the API always follows the same patterns.

Later (more specific) files replace more general codeowners [according to the documentation](https://help.github.com/articles/about-codeowners/), so I also listed `edolstra` and `nbp` again.

https://hydra.nixos.org/build/71880710

For some reason compiling the proper GHC from the binary one eventually
segfaults at some point.

Since it has never worked, just disable it and investigate later.

docker: 18.02 -> 18.03

Hopefully fixes NixOS#37689

acme module: update for simp_le v0.8

umount and mount are now provided top-level