1. CHOST is how one specifies the cross host platform with this
  non-standard configure script. We were just getting lucky with Linux
  cross.

  2. install_name_tool needs the the binutils prefix.

zlib: Fix iOS cross build for 18.09

This allows postgres integration to connect to socket in /tmp

(cherry picked from commit 5715aa1)
Signed-off-by: Domen Kožar <domen@dev.si>

It was pinned to python34, build failed in dependency
python34Packages.pytest. Use python3(6) instead.

(cherry picked from commit a0c5dd8)

A previous attempt to fix tests failing on some machines (#46850)
was unsuccessful, they still failed on Hydra sometimes while
succeeding locally. Revert #46850 and disable these tests instead.

(cherry picked from commit f3a0c8a)

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

(cherry picked from commit 03d8620)

The `pkgs.yabar` package is relatively old (2016-04) and contains
several issues fixed on master. `yabar-unstable` containsa recent master
build with several fixes and a lot of new features (I use
`yabar-unstable` for some time now and had no issues with it).

In the upstream bugtracker some bugs could be fixed on ArchLinux by
simply installing `yabar-git` (an AUR package which builds a recent
master).

To stabilize the module, the option `programs.yabar.package` now
defaults to `pkgs.yabar-unstable` and yields a warning with several
linked issues that are known on `pkgs.yabar`.

The test has been refactored as well to ensure that `yabar` actually
starts (and avoid non-deterministic random success) and takes a
screenshot of a very minimalistic configuration on IceWM.

Fixes #46899

(cherry picked from commit 8b58a71)

(cherry picked from commit 8cd90e4)

…6949)

The test failed non-deterministically on Hydra because interfaces
sometimes weren't yet fully cleaned up when the result was checked.

(cherry picked from commit 0565996)

(cherry picked from commit 9d678ecf88ee0691cd85d348a790802239faaa10)

(cherry picked from commit 172e43335443b15ba25989759eb4085bed55542a)

(cherry picked from commit 1c620c669655c1aa7a101a7fafba7327a60293c1)

(cherry picked from commit 3e4377cf15fb153010ff8d49dcaf131f1dfe0af9)