https://wiki.musl-libc.org/faq.html#Q:-Why-is-the-utmp/wtmp-functionality-only-implemented-as-stubs?

python: housekeeping

…os-in-openssh

openssh: Document default Kerberos support

busybox: bump copybuf, disable utmp/wtmp when not supported (musl)

pythonPackages.testtools: clean up dependencies

Update LLVM default 4 -> 5

Note this doesn't actually provide musl support yet,
just improves our "system" code to understand
musl-based triples and non-glibc linux configurations.

gnu "abi" doesn't mean glibc (mingw, apparently).

lib/systems: musl "ABI"s, examples

Co-Authored-By: Florian Klink <flokli@flokli.de>
Co-Authored-By: Andreas Rammhold <andreas@rammhold.de>

Conflicts:
	pkgs/development/libraries/libclc/default.nix
	pkgs/top-level/all-packages.nix

Note that currently getent is explicitly taken from "glibc.bin",
regardless of build configuration which this preserves for now.
(on non-musl anyway)

reviewer feedback + minor other things I noticed
while revisiting.

Workaround for building "from" the bfd directory but needing
to update files a level above.

This needs to be done *after* autoreconf since autoreconf
will replace these itself, apparently.

Fixes cross build by removing false dependency.

If this is needed again, be careful about *which* "groff" is needed.
(which in terms of build vs host)

musl-cross, native-musl, cross fixes, oh my!

I also saw NixOS#33946, though I'm not sure what to make of it...

There's also 4.0.0, but I'd leave that for later.

This used to be the case before commit 531e4b8 which seems to
have dropped it by accident.

Removes one unnecessary build of pkgconfig during stdenv bootstrapping.

It's not actually needed, and AFAICT has never been. Or at least
Buildroot can build kernel headers as old as 3.2 without running the
config phase.

While at it, set ARCH unconditionally.

Nothing actually needs this.

After the systemd 237 upgrade, radvd wouldn't start anymore because the
PID file cannot be written. It seems that directories in /run has to be
explicitely defined as RuntimeDirectory now. The PID file isn't needed
due to systemd, though, so it was removed along with forking and loggia
via syslog.

This fixes the ipv6 NixOS test.