(cherry picked from commit 206a1c0)
Signed-off-by: Domen Kožar <domen@dev.si>

This results in a marginal closure size increase of ~137mb -> ~141mb.
This only affects the 'out' output, not the 'lib' output, so
libpq-dependent expressions should not bloat as a result of this.

The type of the systemd service is changed to 'notify' on 9.6+, which
will help identify when Postgres is starting/shutting down.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
(cherry picked from commit 1e83cf317443cbc381af72aa09959266bc2d207b)
Signed-off-by: Domen Kožar <domen@dev.si>

Fails transiently. See NixOS/nixpkgs#49249. The
failures look harmless and are fixed with R 3.5 which will be used in
sage 8.5.

(cherry picked from commit d6376bc)

This is to ensure `mtools`-based operations don't wreck the FS.

(cherry picked from commit 2e5eb13)

```
       b      Batch mode. Optimized for huge recursive copies, but less secure if a crash happens during the copy.
```

It seems the "less secure if a crash happens" does not need a crash to
happen.

With batch mode:

```
/[...]/.
  Start (0) does not point to parent (___)
```

For pretty much everything copied in.

Without batch mode, everything passes `fsck`.

See #51150

(cherry picked from commit 1b6a4d3)

ZFS's popularity is growing, and not including it by default is a
bit frustrating. On top of that, the base iso includes ZFS
_anyway_ due to other packages depending upon it.

I think we're in the clear to do this on the basis that Oracle
probably doesn't care, it is probably fine (the SFLC agrees) and
we're a small fish. If a copyright holder asks us to, we can
definitely revert it again.

This reverts commit 33d07c7.

(cherry picked from commit 6db866c)